August 2025

← July This month September → DXpeditions

52 contests running this month. Names only at this zoom — tap a contest for its times, in your own clock or UTC. A contest running across midnight appears on every day it is on the air, with marking the days it continues into rather than starts. Days are UTC, so a contest opening 2200Z sits on the UTC date — which may be the evening before where you are.

Contests in August 2025, by day
Mon	Tue	Wed	Thu	Fri	Sat	Sun
282 AGCW ZAP Merit Contest (ZMC) K1USN Slow Speed Test (SST)	29	302 A1Club Weekly Test (AWT) CWops Test (CWT)×2 (2 sessions)	311 CWops Test (CWT)×2 (2 sessions)	14 K1USN Slow Speed Test (SST) NCCC FT4 Sprint (FT4 NS) NCCC RTTY Sprint (RTTY NS) NCCC Sprint (NS)	25 10-10 International Summer QSO Party (Phone) ARRL 222 MHz and Up Distance Contest Concurso REP 50 MHz JARL Field Day Contest North American QSO Party, CW	37 Hemus VHF Contest 144 MHz SARL HF Phone Contest continues: 10-10 International Summer QSO Party (Phone) continues: ARRL 222 MHz and Up Distance Contest continues: Concurso REP 50 MHz continues: JARL Field Day Contest continues: North American QSO Party, CW
42 AGCW ZAP Merit Contest (ZMC) K1USN Slow Speed Test (SST)	54 ARS Spartan Sprint ZL Autumn and Winter Sprints, CW ZL Autumn and Winter Sprints, FT4 ZL Autumn and Winter Sprints, SSB	63 A1Club Weekly Test (AWT) CWops Test (CWT)×2 (2 sessions) VHF-UHF FT8 Activity: 144 MHz	72 CWops Test (CWT)×2 (2 sessions) SKCC Straight Key Sprint Europe (SKSE)	84 K1USN Slow Speed Test (SST) NCCC FT4 Sprint (FT4 NS) NCCC RTTY Sprint (RTTY NS) NCCC Sprint (NS)	96 Concurso Municipios Espanoles (CME) FISTS Summer Saturday Sprint Maryland-DC QSO Party SARL YL QSO Party SKCC Weekend Sprintathon (WES) WAE DX Contest CW	105 Concurso Municipios Espanoles (CME) SARL HF Digital Contest continues: Maryland-DC QSO Party continues: SKCC Weekend Sprintathon (WES) continues: WAE DX Contest CW
113 4 States QRP Group Second Sunday Sprint (SSS) AGCW ZAP Merit Contest (ZMC) K1USN Slow Speed Test (SST)	124 DARC FT4 Contest ZL Autumn and Winter Sprints, CW ZL Autumn and Winter Sprints, FT4 ZL Autumn and Winter Sprints, SSB	133 A1Club Weekly Test (AWT) CWops Test (CWT)×2 (2 sessions) VHF-UHF FT8 Activity: 432 MHz	141 CWops Test (CWT)×2 (2 sessions)	154 K1USN Slow Speed Test (SST) NCCC FT4 Sprint (FT4 NS) NCCC RTTY Sprint (RTTY NS) NCCC Sprint (NS)	167 ARRL 10 GHz and Up Contest, Round 1 CVA DX Contest (CW) KCJ Contest North American QSO Party, SSB Remembrance Day Contest SARL Youth QSO Party SARTG WW RTTY Contest×2 (2 sessions)	1710 9A Activity Contest ARRL Rookie Roundup, RTTY FISTS Summer Sunday Sprint SARTG WW RTTY Contest×2 (2 sessions) ÖVSV VHF/UHF/Microwave Activity Contest continues: ARRL 10 GHz and Up Contest, Round 1 continues: CVA DX Contest (CW) continues: KCJ Contest continues: North American QSO Party, SSB continues: Remembrance Day Contest
183 AGCW ZAP Merit Contest (ZMC) K1USN Slow Speed Test (SST) continues: ARRL 10 GHz and Up Contest, Round 1	194 DARC HELL-Kurzcontest ZL Autumn and Winter Sprints, CW ZL Autumn and Winter Sprints, FT4 ZL Autumn and Winter Sprints, SSB	204 A1Club Weekly Test (AWT) CWops Test (CWT)×2 (2 sessions) SARL Wednesday 80 m Club Contest VHF-UHF FT8 Activity: 1296 MHz	211 CWops Test (CWT)×2 (2 sessions)	224 K1USN Slow Speed Test (SST) NCCC FT4 Sprint (FT4 NS) NCCC RTTY Sprint (RTTY NS) NCCC Sprint (NS)	233 CVA DX Contest (SSB) Ohio QSO Party YO DX HF Contest	244 SARL HF CW Contest continues: CVA DX Contest (SSB) continues: Ohio QSO Party continues: YO DX HF Contest
252 AGCW ZAP Merit Contest (ZMC) K1USN Slow Speed Test (SST)	263 ZL Autumn and Winter Sprints, CW ZL Autumn and Winter Sprints, FT4 ZL Autumn and Winter Sprints, SSB	273 A1Club Weekly Test (AWT) CWops Test (CWT)×2 (2 sessions) SKCC Straight Key Sprint (SKS)	281 CWops Test (CWT)×2 (2 sessions)	295 K1USN Slow Speed Test (SST) NCCC FT4 Sprint (FT4 NS) NCCC RTTY Sprint (RTTY NS) NCCC Sprint (NS) RTTYops WW SCRY RTTY Contest	303 ALARA Contest World Wide Digi DX Contest continues: RTTYops WW SCRY RTTY Contest	313 RTTYops WW SCRY RTTY Contest continues: ALARA Contest continues: World Wide Digi DX Contest

Every session in August 202552

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106 sessions across 52 contests; repeats share a row.

Contests starting in August 2025
Contest	Date	Start	End	Duration	Mode	Band	Sponsor	Starts in
NCCC FT4 Sprint (FT4 NS)5 sessions	Fri 1 AugFri 8 AugFri 15 AugFri 22 AugFri 29 Aug	0100Z0100Z0100Z0100Z0100Z	0130Z0130Z0130Z0130Z0130Z	30m	FT8/FT4FT4	160-6m	Northern California Contest Club (NCCC)	endedendedendedendedended
NCCC RTTY Sprint (RTTY NS)5 sessions	Fri 1 AugFri 8 AugFri 15 AugFri 22 AugFri 29 Aug	0145Z0145Z0145Z0145Z0145Z	0215Z0215Z0215Z0215Z0215Z	30m	RTTY	160-15m	Northern California Contest Club (NCCC)	endedendedendedendedended
NCCC Sprint (NS)5 sessions	Fri 1 AugFri 8 AugFri 15 AugFri 22 AugFri 29 Aug	0230Z0230Z0230Z0230Z0230Z	0300Z0300Z0300Z0300Z0300Z	30m	CW	160-15m	Northern California Contest Club (NCCC)	endedendedendedendedended
K1USN Slow Speed Test (SST)9 sessions	Fri 1 AugMon 4 AugFri 8 AugMon 11 AugFri 15 AugMon 18 AugFri 22 AugMon 25 AugFri 29 Aug	2000Z0000Z2000Z0000Z2000Z0000Z2000Z0000Z2000Z	2100Z0100Z2100Z0100Z2100Z0100Z2100Z0100Z2100Z	1h	CW	160-10m	K1USN Radio Club	endedendedendedendedendedendedendedendedended
10-10 International Summer QSO Party (Phone)	Sat 2 Aug	0001Z	2359Z Sun 3 Aug	47h 58m	SSB	10m	10-10 International Net	ended
JARL Field Day Contest can't enter	Sat 2 Aug	1200Z	0600Z Sun 3 Aug	18h	CWSSBFMAM	160-23cm	JARL	ended
Concurso REP 50 MHz	Sat 2 Aug	1400Z	1400Z Sun 3 Aug	24h	SSBCWFMAM	6m	REP	ended
ARRL 222 MHz and Up Distance Contest unverified	Sat 2 Aug	1800Z	1800Z Sun 3 Aug	24h	Mixed	1.25m-3cm	ARRL	ended
North American QSO Party, CW	Sat 2 Aug	1800Z	0559Z Sun 3 Aug	11h 59m	CW	160-10m	National Contest Journal (NCJ)	ended
Hemus VHF Contest 144 MHz unverified	Sun 3 Aug	0900Z	1359Z	4h 59m	CWSSBFM	2m	BFRA	ended
SARL HF Phone Contest	Sun 3 Aug	1400Z	1700Z	3h	SSB	80m/40m/20m	SARL	ended
AGCW ZAP Merit Contest (ZMC) unverified4 sessions	Mon 4 AugMon 11 AugMon 18 AugMon 25 Aug	1740Z1740Z1740Z1740Z	1830Z1830Z1830Z1830Z	50m	CW	80m	AGCW-DL	endedendedendedended
ARS Spartan Sprint	Tue 5 Aug	0000Z	0200Z	2h	CW	80-10m	Adventure Radio Society	ended
ZL Autumn and Winter Sprints, CW4 sessions	Tue 5 AugTue 12 AugTue 19 AugTue 26 Aug	0800Z0800Z0800Z0800Z	0829Z0829Z0829Z0829Z	29m	CW	80m	NZART	endedendedendedended
ZL Autumn and Winter Sprints, SSB4 sessions	Tue 5 AugTue 12 AugTue 19 AugTue 26 Aug	0830Z0830Z0830Z0830Z	0859Z0859Z0859Z0859Z	29m	SSB	80m	NZART	endedendedendedended
ZL Autumn and Winter Sprints, FT44 sessions	Tue 5 AugTue 12 AugTue 19 AugTue 26 Aug	0900Z0900Z0900Z0900Z	0929Z0929Z0929Z0929Z	29m	FT8/FT4FT4	80m	NZART	endedendedendedended
A1Club Weekly Test (AWT)4 sessions	Wed 6 AugWed 13 AugWed 20 AugWed 27 Aug	1145Z1145Z1145Z1145Z	1300Z1300Z1300Z1300Z	1h 15m	CW	not recorded	A1 Club	endedendedendedended
CWops Test (CWT)16 sessions	Wed 6 AugWed 6 AugThu 7 AugThu 7 AugWed 13 AugWed 13 AugThu 14 AugThu 14 AugWed 20 AugWed 20 AugThu 21 AugThu 21 AugWed 27 AugWed 27 AugThu 28 AugThu 28 Aug	1300Z1900Z0300Z0700Z1300Z1900Z0300Z0700Z1300Z1900Z0300Z0700Z1300Z1900Z0300Z0700Z	1400Z2000Z0400Z0800Z1400Z2000Z0400Z0800Z1400Z2000Z0400Z0800Z1400Z2000Z0400Z0800Z	1h	CW	160-6m	CWops	endedendedendedendedendedendedendedendedendedendedendedendedendedendedendedended
VHF-UHF FT8 Activity: 144 MHz unverified	Wed 6 Aug	1700Z	2100Z	4h	FT8/FT4	2m	QSO BANAT Association (YO2KQT)	ended
SKCC Straight Key Sprint Europe (SKSE)	Thu 7 Aug	1900Z	2100Z	2h	CW	160-6m	Straight Key Century Club	ended
FISTS Summer Saturday Sprint	Sat 9 Aug	0000Z	2359Z	23h 59m	CW	80-10m	FISTS CW Club (Americas Chapter)	ended
WAE DX Contest CW	Sat 9 Aug	0000Z	2359Z Sun 10 Aug	47h 59m	CW	80-10m	DARC	ended
SKCC Weekend Sprintathon (WES)	Sat 9 Aug	1200Z	2359Z Sun 10 Aug	35h 59m	CW	160-6m	Straight Key Century Club	ended
Concurso Municipios Espanoles (CME)2 sessions	Sat 9 AugSun 10 Aug	1200Z0500Z	2259Z1159Z	10h 59m6h 59m	SSB	80-10m	URE	endedended
Maryland-DC QSO Party unverified	Sat 9 Aug	1400Z	0400Z Sun 10 Aug	14h	SSBCW	160-10m	Anne Arundel Radio Club	ended
SARL YL QSO Party	Sat 9 Aug	1400Z	1500Z	1h	CWSSB	40m	SARL	ended
SARL HF Digital Contest	Sun 10 Aug	1300Z	1600Z	3h	FT8/FT4FT4, FT8	80m/40m/20m	SARL	ended
4 States QRP Group Second Sunday Sprint (SSS)	Mon 11 Aug	0000Z	0200Z	2h	CWSSBDigital	160-10m	4 States QRP Group	ended
DARC FT4 Contest	Tue 12 Aug	1900Z	2029Z	1h 29m	FT8/FT4FT4	80m/40m	DARC	ended
VHF-UHF FT8 Activity: 432 MHz unverified	Wed 13 Aug	1700Z	2100Z	4h	FT8/FT4	70cm	QSO BANAT Association (YO2KQT)	ended
SARTG WW RTTY Contest3 sessions	Sat 16 AugSat 16 AugSun 17 Aug	0000Z1600Z0800Z	0800Z0000Z Sun 17 Aug1600Z	8h	RTTY	80-10m	SARTG (Scandinavian Amateur Radio Teleprinter Group)	endedendedended
Remembrance Day Contest	Sat 16 Aug	0300Z	0300Z Sun 17 Aug	24h	SSBCWRTTY	160-3cm	WIA	ended
ARRL 10 GHz and Up Contest, Round 1	Sat 16 Aug	0900Z	0759Z Mon 18 Aug	46h 59m	Mixed	3cm	ARRL	ended
KCJ Contest	Sat 16 Aug	1200Z	1200Z Sun 17 Aug	24h	CW	160-6m	Keymen's Club of Japan	ended
SARL Youth QSO Party	Sat 16 Aug	1200Z	1300Z	1h	CWSSB	40m	SARL	ended
CVA DX Contest (CW)	Sat 16 Aug	1800Z	2100Z Sun 17 Aug	27h	CW	160-10m	CRAEC	ended
North American QSO Party, SSB	Sat 16 Aug	1800Z	0559Z Sun 17 Aug	11h 59m	SSB	160-10m	National Contest Journal (NCJ)	ended
FISTS Summer Sunday Sprint	Sun 17 Aug	0000Z	2359Z	23h 59m	CW	80-10m	FISTS CW Club (Americas Chapter)	ended
9A Activity Contest	Sun 17 Aug	0700Z	1200Z	5h	CWSSBFM	6-23cm	HRS	ended
ÖVSV VHF/UHF/Microwave Activity Contest	Sun 17 Aug	0700Z	1300Z	6h	CWSSBAMFM	6-3cm	ÖVSV	ended
ARRL Rookie Roundup, RTTY	Sun 17 Aug	1800Z	2359Z	5h 59m	RTTY	80-10m	ARRL	ended
DARC HELL-Kurzcontest unverified	Tue 19 Aug	1800Z	1859Z	59m	DigitalHell	not recorded	DARC	ended
VHF-UHF FT8 Activity: 1296 MHz unverified	Wed 20 Aug	1700Z	2100Z	4h	DigitalFT8	23cm	QSO BANAT Association (YO2KQT)	ended
SARL Wednesday 80 m Club Contest can't enter	Wed 20 Aug	1700Z	1800Z	1h	SSBCWRTTY	80m	SARL	ended
YO DX HF Contest	Sat 23 Aug	1200Z	1159Z Sun 24 Aug	23h 59m	CWSSB	80-10m	FRR	ended
Ohio QSO Party	Sat 23 Aug	1600Z	0400Z Sun 24 Aug	12h	SSBCW	160-10m	Mad River Radio Club	ended
CVA DX Contest (SSB)	Sat 23 Aug	1800Z	2100Z Sun 24 Aug	27h	SSB	160-10m	CRAEC	ended
SARL HF CW Contest	Sun 24 Aug	1400Z	1700Z	3h	CW	80m/40m/20m	SARL	ended
SKCC Straight Key Sprint (SKS)	Wed 27 Aug	0000Z	0200Z	2h	CW	160-6m	Straight Key Century Club	ended
RTTYops WW SCRY RTTY Contest unverified2 sessions	Fri 29 AugSun 31 Aug	2200Z1200Z	1200Z Sat 30 Aug2359Z	14h11h 59m	RTTYRTTY 45 baud	160-10m	RTTYops	endedended
ALARA Contest	Sat 30 Aug	0600Z	0559Z Sun 31 Aug	23h 59m	SSBCW	80-10m	ALARA	ended
World Wide Digi DX Contest	Sat 30 Aug	1200Z	1159Z Sun 31 Aug	23h 59m	FT8/FT4FT4, FT8	160-10m	WWROF / Slovenia Contest Club	ended

NCCC FT4 Sprint (FT4 NS)
FT8/FT4FT4 · 160-6m · Northern California Contest Club (NCCC)
- 0100Z Fri 1 Aug → 0130Z · 30mended
- 0100Z Fri 8 Aug → 0130Z · 30mended
- 0100Z Fri 15 Aug → 0130Z · 30mended
- 0100Z Fri 22 Aug → 0130Z · 30mended
- 0100Z Fri 29 Aug → 0130Z · 30mended
NCCC RTTY Sprint (RTTY NS)
RTTY · 160-15m · Northern California Contest Club (NCCC)
- 0145Z Fri 1 Aug → 0215Z · 30mended
- 0145Z Fri 8 Aug → 0215Z · 30mended
- 0145Z Fri 15 Aug → 0215Z · 30mended
- 0145Z Fri 22 Aug → 0215Z · 30mended
- 0145Z Fri 29 Aug → 0215Z · 30mended
NCCC Sprint (NS)
CW · 160-15m · Northern California Contest Club (NCCC)
- 0230Z Fri 1 Aug → 0300Z · 30mended
- 0230Z Fri 8 Aug → 0300Z · 30mended
- 0230Z Fri 15 Aug → 0300Z · 30mended
- 0230Z Fri 22 Aug → 0300Z · 30mended
- 0230Z Fri 29 Aug → 0300Z · 30mended
K1USN Slow Speed Test (SST)
CW · 160-10m · K1USN Radio Club
- 2000Z Fri 1 Aug → 2100Z · 1hended
- 0000Z Mon 4 Aug → 0100Z · 1hended
- 2000Z Fri 8 Aug → 2100Z · 1hended
- 0000Z Mon 11 Aug → 0100Z · 1hended
- 2000Z Fri 15 Aug → 2100Z · 1hended
- 0000Z Mon 18 Aug → 0100Z · 1hended
- 2000Z Fri 22 Aug → 2100Z · 1hended
- 0000Z Mon 25 Aug → 0100Z · 1hended
- 2000Z Fri 29 Aug → 2100Z · 1hended
10-10 International Summer QSO Party (Phone)
SSB · 10m · 10-10 International Net
- 0001Z Sat 2 Aug → 2359Z Sun 3 Aug · 47h 58mended
JARL Field Day Contest can't enter
CWSSBFMAM · 160-23cm · JARL
- 1200Z Sat 2 Aug → 0600Z Sun 3 Aug · 18hended
Concurso REP 50 MHz
SSBCWFMAM · 6m · REP
- 1400Z Sat 2 Aug → 1400Z Sun 3 Aug · 24hended
ARRL 222 MHz and Up Distance Contest unverified
Mixed · 1.25m-3cm · ARRL
- 1800Z Sat 2 Aug → 1800Z Sun 3 Aug · 24hended
North American QSO Party, CW
CW · 160-10m · National Contest Journal (NCJ)
- 1800Z Sat 2 Aug → 0559Z Sun 3 Aug · 11h 59mended
Hemus VHF Contest 144 MHz unverified
CWSSBFM · 2m · BFRA
- 0900Z Sun 3 Aug → 1359Z · 4h 59mended
SARL HF Phone Contest
SSB · 80m/40m/20m · SARL
- 1400Z Sun 3 Aug → 1700Z · 3hended
AGCW ZAP Merit Contest (ZMC) unverified
CW · 80m · AGCW-DL
- 1740Z Mon 4 Aug → 1830Z · 50mended
- 1740Z Mon 11 Aug → 1830Z · 50mended
- 1740Z Mon 18 Aug → 1830Z · 50mended
- 1740Z Mon 25 Aug → 1830Z · 50mended
ARS Spartan Sprint
CW · 80-10m · Adventure Radio Society
- 0000Z Tue 5 Aug → 0200Z · 2hended
ZL Autumn and Winter Sprints, CW
CW · 80m · NZART
- 0800Z Tue 5 Aug → 0829Z · 29mended
- 0800Z Tue 12 Aug → 0829Z · 29mended
- 0800Z Tue 19 Aug → 0829Z · 29mended
- 0800Z Tue 26 Aug → 0829Z · 29mended
ZL Autumn and Winter Sprints, SSB
SSB · 80m · NZART
- 0830Z Tue 5 Aug → 0859Z · 29mended
- 0830Z Tue 12 Aug → 0859Z · 29mended
- 0830Z Tue 19 Aug → 0859Z · 29mended
- 0830Z Tue 26 Aug → 0859Z · 29mended
ZL Autumn and Winter Sprints, FT4
FT8/FT4FT4 · 80m · NZART
- 0900Z Tue 5 Aug → 0929Z · 29mended
- 0900Z Tue 12 Aug → 0929Z · 29mended
- 0900Z Tue 19 Aug → 0929Z · 29mended
- 0900Z Tue 26 Aug → 0929Z · 29mended
A1Club Weekly Test (AWT)
CW · A1 Club
- 1145Z Wed 6 Aug → 1300Z · 1h 15mended
- 1145Z Wed 13 Aug → 1300Z · 1h 15mended
- 1145Z Wed 20 Aug → 1300Z · 1h 15mended
- 1145Z Wed 27 Aug → 1300Z · 1h 15mended
CWops Test (CWT)
CW · 160-6m · CWops
- 1300Z Wed 6 Aug → 1400Z · 1hended
- 1900Z Wed 6 Aug → 2000Z · 1hended
- 0300Z Thu 7 Aug → 0400Z · 1hended
- 0700Z Thu 7 Aug → 0800Z · 1hended
- 1300Z Wed 13 Aug → 1400Z · 1hended
- 1900Z Wed 13 Aug → 2000Z · 1hended
- 0300Z Thu 14 Aug → 0400Z · 1hended
- 0700Z Thu 14 Aug → 0800Z · 1hended
- 1300Z Wed 20 Aug → 1400Z · 1hended
- 1900Z Wed 20 Aug → 2000Z · 1hended
- 0300Z Thu 21 Aug → 0400Z · 1hended
- 0700Z Thu 21 Aug → 0800Z · 1hended
- 1300Z Wed 27 Aug → 1400Z · 1hended
- 1900Z Wed 27 Aug → 2000Z · 1hended
- 0300Z Thu 28 Aug → 0400Z · 1hended
- 0700Z Thu 28 Aug → 0800Z · 1hended
VHF-UHF FT8 Activity: 144 MHz unverified
FT8/FT4 · 2m · QSO BANAT Association (YO2KQT)
- 1700Z Wed 6 Aug → 2100Z · 4hended
SKCC Straight Key Sprint Europe (SKSE)
CW · 160-6m · Straight Key Century Club
- 1900Z Thu 7 Aug → 2100Z · 2hended
FISTS Summer Saturday Sprint
CW · 80-10m · FISTS CW Club (Americas Chapter)
- 0000Z Sat 9 Aug → 2359Z · 23h 59mended
WAE DX Contest CW
CW · 80-10m · DARC
- 0000Z Sat 9 Aug → 2359Z Sun 10 Aug · 47h 59mended
SKCC Weekend Sprintathon (WES)
CW · 160-6m · Straight Key Century Club
- 1200Z Sat 9 Aug → 2359Z Sun 10 Aug · 35h 59mended
Concurso Municipios Espanoles (CME)
SSB · 80-10m · URE
- 1200Z Sat 9 Aug → 2259Z · 10h 59mended
- 0500Z Sun 10 Aug → 1159Z · 6h 59mended
Maryland-DC QSO Party unverified
SSBCW · 160-10m · Anne Arundel Radio Club
- 1400Z Sat 9 Aug → 0400Z Sun 10 Aug · 14hended
SARL YL QSO Party
CWSSB · 40m · SARL
- 1400Z Sat 9 Aug → 1500Z · 1hended
SARL HF Digital Contest
FT8/FT4FT4, FT8 · 80m/40m/20m · SARL
- 1300Z Sun 10 Aug → 1600Z · 3hended
4 States QRP Group Second Sunday Sprint (SSS)
CWSSBDigital · 160-10m · 4 States QRP Group
- 0000Z Mon 11 Aug → 0200Z · 2hended
DARC FT4 Contest
FT8/FT4FT4 · 80m/40m · DARC
- 1900Z Tue 12 Aug → 2029Z · 1h 29mended
VHF-UHF FT8 Activity: 432 MHz unverified
FT8/FT4 · 70cm · QSO BANAT Association (YO2KQT)
- 1700Z Wed 13 Aug → 2100Z · 4hended
SARTG WW RTTY Contest
RTTY · 80-10m · SARTG (Scandinavian Amateur Radio Teleprinter Group)
- 0000Z Sat 16 Aug → 0800Z · 8hended
- 1600Z Sat 16 Aug → 0000Z Sun 17 Aug · 8hended
- 0800Z Sun 17 Aug → 1600Z · 8hended
Remembrance Day Contest
SSBCWRTTY · 160-3cm · WIA
- 0300Z Sat 16 Aug → 0300Z Sun 17 Aug · 24hended
ARRL 10 GHz and Up Contest, Round 1
Mixed · 3cm · ARRL
- 0900Z Sat 16 Aug → 0759Z Mon 18 Aug · 46h 59mended
KCJ Contest
CW · 160-6m · Keymen's Club of Japan
- 1200Z Sat 16 Aug → 1200Z Sun 17 Aug · 24hended
SARL Youth QSO Party
CWSSB · 40m · SARL
- 1200Z Sat 16 Aug → 1300Z · 1hended
CVA DX Contest (CW)
CW · 160-10m · CRAEC
- 1800Z Sat 16 Aug → 2100Z Sun 17 Aug · 27hended
North American QSO Party, SSB
SSB · 160-10m · National Contest Journal (NCJ)
- 1800Z Sat 16 Aug → 0559Z Sun 17 Aug · 11h 59mended
FISTS Summer Sunday Sprint
CW · 80-10m · FISTS CW Club (Americas Chapter)
- 0000Z Sun 17 Aug → 2359Z · 23h 59mended
9A Activity Contest
CWSSBFM · 6-23cm · HRS
- 0700Z Sun 17 Aug → 1200Z · 5hended
ÖVSV VHF/UHF/Microwave Activity Contest
CWSSBAMFM · 6-3cm · ÖVSV
- 0700Z Sun 17 Aug → 1300Z · 6hended
ARRL Rookie Roundup, RTTY
RTTY · 80-10m · ARRL
- 1800Z Sun 17 Aug → 2359Z · 5h 59mended
DARC HELL-Kurzcontest unverified
DigitalHell · DARC
- 1800Z Tue 19 Aug → 1859Z · 59mended
VHF-UHF FT8 Activity: 1296 MHz unverified
DigitalFT8 · 23cm · QSO BANAT Association (YO2KQT)
- 1700Z Wed 20 Aug → 2100Z · 4hended
SARL Wednesday 80 m Club Contest can't enter
SSBCWRTTY · 80m · SARL
- 1700Z Wed 20 Aug → 1800Z · 1hended
YO DX HF Contest
CWSSB · 80-10m · FRR
- 1200Z Sat 23 Aug → 1159Z Sun 24 Aug · 23h 59mended
Ohio QSO Party
SSBCW · 160-10m · Mad River Radio Club
- 1600Z Sat 23 Aug → 0400Z Sun 24 Aug · 12hended
CVA DX Contest (SSB)
SSB · 160-10m · CRAEC
- 1800Z Sat 23 Aug → 2100Z Sun 24 Aug · 27hended
SARL HF CW Contest
CW · 80m/40m/20m · SARL
- 1400Z Sun 24 Aug → 1700Z · 3hended
SKCC Straight Key Sprint (SKS)
CW · 160-6m · Straight Key Century Club
- 0000Z Wed 27 Aug → 0200Z · 2hended
RTTYops WW SCRY RTTY Contest unverified
RTTYRTTY 45 baud · 160-10m · RTTYops
- 2200Z Fri 29 Aug → 1200Z Sat 30 Aug · 14hended
- 1200Z Sun 31 Aug → 2359Z · 11h 59mended
ALARA Contest
SSBCW · 80-10m · ALARA
- 0600Z Sat 30 Aug → 0559Z Sun 31 Aug · 23h 59mended
World Wide Digi DX Contest
FT8/FT4FT4, FT8 · 160-10m · WWROF / Slovenia Contest Club
- 1200Z Sat 30 Aug → 1159Z Sun 31 Aug · 23h 59mended

August 2025

Every session in August 202552

JARL Field Day Contest can't enter

ARRL 222 MHz and Up Distance Contest unverified

Hemus VHF Contest 144 MHz unverified

AGCW ZAP Merit Contest (ZMC) unverified

VHF-UHF FT8 Activity: 144 MHz unverified

Maryland-DC QSO Party unverified

VHF-UHF FT8 Activity: 432 MHz unverified

DARC HELL-Kurzcontest unverified

VHF-UHF FT8 Activity: 1296 MHz unverified

SARL Wednesday 80 m Club Contest can't enter

RTTYops WW SCRY RTTY Contest unverified