December 2099

← November This month January → DXpeditions

31 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 December 2099, by day
Mon	Tue	Wed	Thu	Fri	Sat	Sun
302 AGCW ZAP Merit Contest (ZMC) K1USN Slow Speed Test (SST)	1	23 A1Club Weekly Test (AWT) CWops Test (CWT)×2 (2 sessions) VHF-UHF FT8 Activity: 144 MHz	32 CWops Test (CWT)×2 (2 sessions) SKCC Straight Key Sprint Europe (SKSE)	45 ARRL 160-Meter Contest K1USN Slow Speed Test (SST) NCCC FT4 Sprint (FT4 NS) NCCC RTTY Sprint (RTTY NS) NCCC Sprint (NS)	54 FT Roundup International FT Challenge USKA Weihnachtswettbewerb (SSB / Digital)×2 (2 sessions) continues: ARRL 160-Meter Contest	63 continues: ARRL 160-Meter Contest continues: FT Roundup continues: International FT Challenge
72 AGCW ZAP Merit Contest (ZMC) K1USN Slow Speed Test (SST)	82 ARS Spartan Sprint DARC CW-Ausbildungscontest	93 A1Club Weekly Test (AWT) CWops Test (CWT)×2 (2 sessions) VHF-UHF FT8 Activity: 432 MHz	101 CWops Test (CWT)×2 (2 sessions)	114 K1USN Slow Speed Test (SST) NCCC FT4 Sprint (FT4 NS) NCCC RTTY Sprint (RTTY NS) NCCC Sprint (NS)	126 ARI 40/80 Contest ARRL 10-Meter Contest PODXS 070 Club Triple Play Low Band Sprint DOUBLEHEADER SKCC Weekend Sprintathon (WES) TRC DIGI Contest USKA Weihnachtswettbewerb (CW / Digital)×2 (2 sessions)	135 continues: ARI 40/80 Contest continues: ARRL 10-Meter Contest continues: PODXS 070 Club Triple Play Low Band Sprint DOUBLEHEADER continues: SKCC Weekend Sprintathon (WES) continues: TRC DIGI Contest
144 4 States QRP Group Second Sunday Sprint (SSS) AGCW ZAP Merit Contest (ZMC) K1USN Slow Speed Test (SST) continues: PODXS 070 Club Triple Play Low Band Sprint DOUBLEHEADER	15	163 A1Club Weekly Test (AWT) CWops Test (CWT)×2 (2 sessions) VHF-UHF FT8 Activity: 1296 MHz	171 CWops Test (CWT)×2 (2 sessions)	185 AGB-Party K1USN Slow Speed Test (SST) NCCC FT4 Sprint (FT4 NS) NCCC RTTY Sprint (RTTY NS) NCCC Sprint (NS)	192 Croatian DX Contest (9A DX) OK DX RTTY Contest	204 ARRL Rookie Roundup, CW ÖVSV VHF/UHF/Microwave Activity Contest continues: Croatian DX Contest (9A DX) continues: OK DX RTTY Contest
212 AGCW ZAP Merit Contest (ZMC) K1USN Slow Speed Test (SST)	22	233 A1Club Weekly Test (AWT) CWops Test (CWT)×2 (2 sessions) SKCC Straight Key Sprint (SKS)	241 CWops Test (CWT)×2 (2 sessions)	254 K1USN Slow Speed Test (SST) NCCC FT4 Sprint (FT4 NS) NCCC RTTY Sprint (RTTY NS) NCCC Sprint (NS)	261 DARC Weihnachtswettbewerb (XMAS Contest)	27
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)	18 AGB New Year Snowball AGCW Happy New Year Contest (HNY) AGCW VHF/UHF Contest×2 (2 sessions) ARRL Straight Key Night NCCC FT4 Sprint (FT4 NS) NCCC RTTY Sprint (RTTY NS) NCCC Sprint (NS) SARTG New Year RTTY Contest	25 ARRL Kids Day (January) ARRL RTTY Roundup New Year QSO Party PODXS 070 Club PSKfest RSGB AFS Contest, CW	33 Vytautas Magnus Contest (VMC) continues: ARRL RTTY Roundup continues: New Year QSO Party

Every session in December 209931

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75 sessions across 31 contests; repeats share a row.

Contests starting in December 2099
Contest	Date	Start	End	Duration	Mode	Band	Sponsor	Starts in
A1Club Weekly Test (AWT)5 sessions	Wed 2 DecWed 9 DecWed 16 DecWed 23 DecWed 30 Dec	1145Z1145Z1145Z1145Z1145Z	1300Z1300Z1300Z1300Z1300Z	1h 15m	CW	not recorded	A1 Club	in 26699 daysin 26706 daysin 26713 daysin 26720 daysin 26727 days
CWops Test (CWT)20 sessions	Wed 2 DecWed 2 DecThu 3 DecThu 3 DecWed 9 DecWed 9 DecThu 10 DecThu 10 DecWed 16 DecWed 16 DecThu 17 DecThu 17 DecWed 23 DecWed 23 DecThu 24 DecThu 24 DecWed 30 DecWed 30 DecThu 31 DecThu 31 Dec	1300Z1900Z0300Z0700Z1300Z1900Z0300Z0700Z1300Z1900Z0300Z0700Z1300Z1900Z0300Z0700Z1300Z1900Z0300Z0700Z	1400Z2000Z0400Z0800Z1400Z2000Z0400Z0800Z1400Z2000Z0400Z0800Z1400Z2000Z0400Z0800Z1400Z2000Z0400Z0800Z	1h	CW	160-6m	CWops	in 26699 daysin 26699 daysin 26699 daysin 26700 daysin 26706 daysin 26706 daysin 26706 daysin 26707 daysin 26713 daysin 26713 daysin 26713 daysin 26714 daysin 26720 daysin 26720 daysin 26720 daysin 26721 daysin 26727 daysin 26727 daysin 26727 daysin 26728 days
VHF-UHF FT8 Activity: 144 MHz unverified	Wed 2 Dec	1700Z	2100Z	4h	FT8/FT4	2m	QSO BANAT Association (YO2KQT)	in 26699 days
SKCC Straight Key Sprint Europe (SKSE)	Thu 3 Dec	2000Z	2200Z	2h	CW	160-6m	Straight Key Century Club	in 26700 days
NCCC FT4 Sprint (FT4 NS)4 sessions	Fri 4 DecFri 11 DecFri 18 DecFri 25 Dec	0100Z0100Z0100Z0100Z	0130Z0130Z0130Z0130Z	30m	FT8/FT4FT4	160-6m	Northern California Contest Club (NCCC)	in 26700 daysin 26707 daysin 26714 daysin 26721 days
NCCC RTTY Sprint (RTTY NS)4 sessions	Fri 4 DecFri 11 DecFri 18 DecFri 25 Dec	0145Z0145Z0145Z0145Z	0215Z0215Z0215Z0215Z	30m	RTTY	160-15m	Northern California Contest Club (NCCC)	in 26700 daysin 26707 daysin 26714 daysin 26721 days
NCCC Sprint (NS)4 sessions	Fri 4 DecFri 11 DecFri 18 DecFri 25 Dec	0230Z0230Z0230Z0230Z	0300Z0300Z0300Z0300Z	30m	CW	160-15m	Northern California Contest Club (NCCC)	in 26700 daysin 26707 daysin 26714 daysin 26721 days
K1USN Slow Speed Test (SST)8 sessions	Fri 4 DecMon 7 DecFri 11 DecMon 14 DecFri 18 DecMon 21 DecFri 25 DecMon 28 Dec	2000Z0000Z2000Z0000Z2000Z0000Z2000Z0000Z	2100Z0100Z2100Z0100Z2100Z0100Z2100Z0100Z	1h	CW	160-10m	K1USN Radio Club	in 26701 daysin 26703 daysin 26708 daysin 26710 daysin 26715 daysin 26717 daysin 26722 daysin 26724 days
ARRL 160-Meter Contest	Fri 4 Dec	2200Z	1559Z Sun 6 Dec	41h 59m	CW	160m	ARRL	in 26701 days
USKA Weihnachtswettbewerb (SSB / Digital) can't enter2 sessions	Sat 5 DecSat 5 Dec	0700Z1000Z	0959Z1059Z	2h 59m59m	SSBRTTYDigitalFT8/FT4PSK31, PSK63	80m/40m	USKA	in 26702 daysin 26702 days
International FT Challenge	Sat 5 Dec	1800Z	2359Z Sun 6 Dec	29h 59m	FT8/FT4FT4, FT8	80-10m	International FT Challenge	in 26702 days
FT Roundup	Sat 5 Dec	1800Z	2359Z Sun 6 Dec	29h 59m	FT8/FT4FT4, FT8	80-10m	RTTY Contesting	in 26702 days
AGCW ZAP Merit Contest (ZMC) unverified4 sessions	Mon 7 DecMon 14 DecMon 21 DecMon 28 Dec	1740Z1740Z1740Z1740Z	1830Z1830Z1830Z1830Z	50m	CW	80m	AGCW-DL	in 26704 daysin 26711 daysin 26718 daysin 26725 days
ARS Spartan Sprint	Tue 8 Dec	0100Z	0300Z	2h	CW	80-10m	Adventure Radio Society	in 26704 days
DARC CW-Ausbildungscontest unverified	Tue 8 Dec	1800Z	1859Z	59m	CW	not recorded	DARC	in 26705 days
VHF-UHF FT8 Activity: 432 MHz unverified	Wed 9 Dec	1700Z	2100Z	4h	FT8/FT4	70cm	QSO BANAT Association (YO2KQT)	in 26706 days
ARRL 10-Meter Contest	Sat 12 Dec	0000Z	2359Z Sun 13 Dec	47h 59m	CWSSB	10m	ARRL	in 26708 days
PODXS 070 Club Triple Play Low Band Sprint DOUBLEHEADER	Sat 12 Dec	0000Z	2359Z Mon 14 Dec	71h 59m	DigitalPSK31	160m/80m/40m	PODXS 070 Club	in 26708 days
TRC DIGI Contest	Sat 12 Dec	0600Z	1800Z Sun 13 Dec	36h	RTTY	160-10m	Thracian Rose Club	in 26709 days
USKA Weihnachtswettbewerb (CW / Digital) can't enter2 sessions	Sat 12 DecSat 12 Dec	0700Z1000Z	0959Z1059Z	2h 59m59m	CWRTTYDigitalFT8/FT4PSK31, PSK63	80m/40m	USKA	in 26709 daysin 26709 days
SKCC Weekend Sprintathon (WES)	Sat 12 Dec	1200Z	2359Z Sun 13 Dec	35h 59m	CW	160-6m	Straight Key Century Club	in 26709 days
ARI 40/80 Contest can't enter	Sat 12 Dec	1300Z	1259Z Sun 13 Dec	23h 59m	CWSSBRTTY	80m/40m	ARI	in 26709 days
4 States QRP Group Second Sunday Sprint (SSS)	Mon 14 Dec	0100Z	0300Z	2h	CWSSBDigital	160-10m	4 States QRP Group	in 26710 days
VHF-UHF FT8 Activity: 1296 MHz unverified	Wed 16 Dec	1700Z	2100Z	4h	DigitalFT8	23cm	QSO BANAT Association (YO2KQT)	in 26713 days
AGB-Party unverified	Fri 18 Dec	1600Z	1700Z	1h	CWSSBDigitalFT8, FT4	80m/40m	AGB	in 26715 days
OK DX RTTY Contest	Sat 19 Dec	0000Z	0000Z Sun 20 Dec	24h	RTTYBaudot	80-10m	CRK	in 26715 days
Croatian DX Contest (9A DX)	Sat 19 Dec	1400Z	1359Z Sun 20 Dec	23h 59m	CWSSB	160-10m	HRS	in 26716 days
ÖVSV VHF/UHF/Microwave Activity Contest	Sun 20 Dec	0700Z	1300Z	6h	CWSSBAMFM	6-3cm	ÖVSV	in 26717 days
ARRL Rookie Roundup, CW	Sun 20 Dec	1800Z	2359Z	5h 59m	CW	80-10m	ARRL	in 26717 days
SKCC Straight Key Sprint (SKS)	Wed 23 Dec	0000Z	0200Z	2h	CW	160-6m	Straight Key Century Club	in 26719 days
DARC Weihnachtswettbewerb (XMAS Contest)	Sat 26 Dec	0830Z	1059Z	2h 29m	CWSSB	80m/40m	DARC	in 26723 days

A1Club Weekly Test (AWT)
CW · A1 Club
- 1145Z Wed 2 Dec → 1300Z · 1h 15min 26699 days
- 1145Z Wed 9 Dec → 1300Z · 1h 15min 26706 days
- 1145Z Wed 16 Dec → 1300Z · 1h 15min 26713 days
- 1145Z Wed 23 Dec → 1300Z · 1h 15min 26720 days
- 1145Z Wed 30 Dec → 1300Z · 1h 15min 26727 days
CWops Test (CWT)
CW · 160-6m · CWops
- 1300Z Wed 2 Dec → 1400Z · 1hin 26699 days
- 1900Z Wed 2 Dec → 2000Z · 1hin 26699 days
- 0300Z Thu 3 Dec → 0400Z · 1hin 26699 days
- 0700Z Thu 3 Dec → 0800Z · 1hin 26700 days
- 1300Z Wed 9 Dec → 1400Z · 1hin 26706 days
- 1900Z Wed 9 Dec → 2000Z · 1hin 26706 days
- 0300Z Thu 10 Dec → 0400Z · 1hin 26706 days
- 0700Z Thu 10 Dec → 0800Z · 1hin 26707 days
- 1300Z Wed 16 Dec → 1400Z · 1hin 26713 days
- 1900Z Wed 16 Dec → 2000Z · 1hin 26713 days
- 0300Z Thu 17 Dec → 0400Z · 1hin 26713 days
- 0700Z Thu 17 Dec → 0800Z · 1hin 26714 days
- 1300Z Wed 23 Dec → 1400Z · 1hin 26720 days
- 1900Z Wed 23 Dec → 2000Z · 1hin 26720 days
- 0300Z Thu 24 Dec → 0400Z · 1hin 26720 days
- 0700Z Thu 24 Dec → 0800Z · 1hin 26721 days
- 1300Z Wed 30 Dec → 1400Z · 1hin 26727 days
- 1900Z Wed 30 Dec → 2000Z · 1hin 26727 days
- 0300Z Thu 31 Dec → 0400Z · 1hin 26727 days
- 0700Z Thu 31 Dec → 0800Z · 1hin 26728 days
VHF-UHF FT8 Activity: 144 MHz unverified
FT8/FT4 · 2m · QSO BANAT Association (YO2KQT)
- 1700Z Wed 2 Dec → 2100Z · 4hin 26699 days
SKCC Straight Key Sprint Europe (SKSE)
CW · 160-6m · Straight Key Century Club
- 2000Z Thu 3 Dec → 2200Z · 2hin 26700 days
NCCC FT4 Sprint (FT4 NS)
FT8/FT4FT4 · 160-6m · Northern California Contest Club (NCCC)
- 0100Z Fri 4 Dec → 0130Z · 30min 26700 days
- 0100Z Fri 11 Dec → 0130Z · 30min 26707 days
- 0100Z Fri 18 Dec → 0130Z · 30min 26714 days
- 0100Z Fri 25 Dec → 0130Z · 30min 26721 days
NCCC RTTY Sprint (RTTY NS)
RTTY · 160-15m · Northern California Contest Club (NCCC)
- 0145Z Fri 4 Dec → 0215Z · 30min 26700 days
- 0145Z Fri 11 Dec → 0215Z · 30min 26707 days
- 0145Z Fri 18 Dec → 0215Z · 30min 26714 days
- 0145Z Fri 25 Dec → 0215Z · 30min 26721 days
NCCC Sprint (NS)
CW · 160-15m · Northern California Contest Club (NCCC)
- 0230Z Fri 4 Dec → 0300Z · 30min 26700 days
- 0230Z Fri 11 Dec → 0300Z · 30min 26707 days
- 0230Z Fri 18 Dec → 0300Z · 30min 26714 days
- 0230Z Fri 25 Dec → 0300Z · 30min 26721 days
K1USN Slow Speed Test (SST)
CW · 160-10m · K1USN Radio Club
- 2000Z Fri 4 Dec → 2100Z · 1hin 26701 days
- 0000Z Mon 7 Dec → 0100Z · 1hin 26703 days
- 2000Z Fri 11 Dec → 2100Z · 1hin 26708 days
- 0000Z Mon 14 Dec → 0100Z · 1hin 26710 days
- 2000Z Fri 18 Dec → 2100Z · 1hin 26715 days
- 0000Z Mon 21 Dec → 0100Z · 1hin 26717 days
- 2000Z Fri 25 Dec → 2100Z · 1hin 26722 days
- 0000Z Mon 28 Dec → 0100Z · 1hin 26724 days
ARRL 160-Meter Contest
CW · 160m · ARRL
- 2200Z Fri 4 Dec → 1559Z Sun 6 Dec · 41h 59min 26701 days
USKA Weihnachtswettbewerb (SSB / Digital) can't enter
SSBRTTYDigitalFT8/FT4PSK31, PSK63 · 80m/40m · USKA
- 0700Z Sat 5 Dec → 0959Z · 2h 59min 26702 days
- 1000Z Sat 5 Dec → 1059Z · 59min 26702 days
International FT Challenge
FT8/FT4FT4, FT8 · 80-10m · International FT Challenge
- 1800Z Sat 5 Dec → 2359Z Sun 6 Dec · 29h 59min 26702 days
FT Roundup
FT8/FT4FT4, FT8 · 80-10m · RTTY Contesting
- 1800Z Sat 5 Dec → 2359Z Sun 6 Dec · 29h 59min 26702 days
AGCW ZAP Merit Contest (ZMC) unverified
CW · 80m · AGCW-DL
- 1740Z Mon 7 Dec → 1830Z · 50min 26704 days
- 1740Z Mon 14 Dec → 1830Z · 50min 26711 days
- 1740Z Mon 21 Dec → 1830Z · 50min 26718 days
- 1740Z Mon 28 Dec → 1830Z · 50min 26725 days
ARS Spartan Sprint
CW · 80-10m · Adventure Radio Society
- 0100Z Tue 8 Dec → 0300Z · 2hin 26704 days
DARC CW-Ausbildungscontest unverified
CW · DARC
- 1800Z Tue 8 Dec → 1859Z · 59min 26705 days
VHF-UHF FT8 Activity: 432 MHz unverified
FT8/FT4 · 70cm · QSO BANAT Association (YO2KQT)
- 1700Z Wed 9 Dec → 2100Z · 4hin 26706 days
ARRL 10-Meter Contest
CWSSB · 10m · ARRL
- 0000Z Sat 12 Dec → 2359Z Sun 13 Dec · 47h 59min 26708 days
PODXS 070 Club Triple Play Low Band Sprint DOUBLEHEADER
DigitalPSK31 · 160m/80m/40m · PODXS 070 Club
- 0000Z Sat 12 Dec → 2359Z Mon 14 Dec · 71h 59min 26708 days
TRC DIGI Contest
RTTY · 160-10m · Thracian Rose Club
- 0600Z Sat 12 Dec → 1800Z Sun 13 Dec · 36hin 26709 days
USKA Weihnachtswettbewerb (CW / Digital) can't enter
CWRTTYDigitalFT8/FT4PSK31, PSK63 · 80m/40m · USKA
- 0700Z Sat 12 Dec → 0959Z · 2h 59min 26709 days
- 1000Z Sat 12 Dec → 1059Z · 59min 26709 days
SKCC Weekend Sprintathon (WES)
CW · 160-6m · Straight Key Century Club
- 1200Z Sat 12 Dec → 2359Z Sun 13 Dec · 35h 59min 26709 days
ARI 40/80 Contest can't enter
CWSSBRTTY · 80m/40m · ARI
- 1300Z Sat 12 Dec → 1259Z Sun 13 Dec · 23h 59min 26709 days
4 States QRP Group Second Sunday Sprint (SSS)
CWSSBDigital · 160-10m · 4 States QRP Group
- 0100Z Mon 14 Dec → 0300Z · 2hin 26710 days
VHF-UHF FT8 Activity: 1296 MHz unverified
DigitalFT8 · 23cm · QSO BANAT Association (YO2KQT)
- 1700Z Wed 16 Dec → 2100Z · 4hin 26713 days
AGB-Party unverified
CWSSBDigitalFT8, FT4 · 80m/40m · AGB
- 1600Z Fri 18 Dec → 1700Z · 1hin 26715 days
OK DX RTTY Contest
RTTYBaudot · 80-10m · CRK
- 0000Z Sat 19 Dec → 0000Z Sun 20 Dec · 24hin 26715 days
Croatian DX Contest (9A DX)
CWSSB · 160-10m · HRS
- 1400Z Sat 19 Dec → 1359Z Sun 20 Dec · 23h 59min 26716 days
ÖVSV VHF/UHF/Microwave Activity Contest
CWSSBAMFM · 6-3cm · ÖVSV
- 0700Z Sun 20 Dec → 1300Z · 6hin 26717 days
ARRL Rookie Roundup, CW
CW · 80-10m · ARRL
- 1800Z Sun 20 Dec → 2359Z · 5h 59min 26717 days
SKCC Straight Key Sprint (SKS)
CW · 160-6m · Straight Key Century Club
- 0000Z Wed 23 Dec → 0200Z · 2hin 26719 days
DARC Weihnachtswettbewerb (XMAS Contest)
CWSSB · 80m/40m · DARC
- 0830Z Sat 26 Dec → 1059Z · 2h 29min 26723 days

December 2099

Every session in December 209931

VHF-UHF FT8 Activity: 144 MHz unverified

USKA Weihnachtswettbewerb (SSB / Digital) can't enter

AGCW ZAP Merit Contest (ZMC) unverified

DARC CW-Ausbildungscontest unverified

VHF-UHF FT8 Activity: 432 MHz unverified

USKA Weihnachtswettbewerb (CW / Digital) can't enter

ARI 40/80 Contest can't enter

VHF-UHF FT8 Activity: 1296 MHz unverified

AGB-Party unverified