Contest Calendar¶
Updated 21:00 UTC 2026-06-19
Next 30 Days¶
All Asian DX CW¶
0 days until start
| Start | 2026-06-20 00:00 UTC |
| End | 2026-06-22 00:00 UTC |
| Duration | 48 hours |
| Modes | CW |
| Bands | 160m, 80m, 40m, 20m, 15m, 10m |
| Sponsor | JARL |
All Asian DX — CW, Asian stations work the world
IARU HF Championship¶
3w until start
| Start | 2026-07-11 12:00 UTC |
| End | 2026-07-12 12:00 UTC |
| Duration | 24 hours |
| Modes | SSB, CW |
| Bands | 160m, 80m, 40m, 20m, 15m, 10m |
| Sponsor | IARU |
IARU society stations on all bands — 24 hour worldwide event
Full Year Calendar¶
| Contest | Date (UTC) | Start | Hours | Modes | Countdown |
|---|---|---|---|---|---|
| All Asian DX CW | Jun 20–22 | Sat 00:00 | 48 | CW | 0 days |
| IARU HF Championship | Jul 11–12 | Sat 12:00 | 24 | SSB/CW | 3w |
| WAE CW | Aug 08–10 | Sat 00:00 | 48 | CW | 7w |
| All Asian DX SSB | Sep 05–07 | Sat 00:00 | 48 | SSB | 11w |
| WAE SSB | Sep 12–14 | Sat 00:00 | 48 | SSB | 12w |
| SAC CW | Sep 19–20 | Sat 12:00 | 24 | CW | 13w |
| CQ WW RTTY | Sep 26–28 | Sat 00:00 | 48 | RTTY | 14w |
| Oceania DX SSB | Oct 03–04 | Sat 06:00 | 24 | SSB | 15w |
| Oceania DX CW | Oct 10–11 | Sat 06:00 | 24 | CW | 16w |
| SAC SSB | Oct 17–18 | Sat 12:00 | 24 | SSB | 17w |
| CQ WW SSB | Oct 24–26 | Sat 00:00 | 48 | SSB | 18w |
| WAE RTTY | Nov 14–16 | Sat 00:00 | 48 | RTTY | 21w |
| JIDX SSB | Nov 14–15 | Sat 07:00 | 30 | SSB | 21w |
| CQ WW CW | Nov 28–30 | Sat 00:00 | 48 | CW | 23w |
| ARRL 160m | Dec 04–06 | Fri 22:00 | 42 | CW | 24w |
| ARRL 10m | Dec 12–14 | Sat 00:00 | 48 | SSB/CW | 25w |
| CQ 160m CW | Jan 29–31 | Fri 22:00 | 48 | CW | 32w |
| CQ WPX RTTY | Feb 13–15 | Sat 00:00 | 48 | RTTY | 34w |
| ARRL DX CW | Feb 20–22 | Sat 00:00 | 48 | CW | 35w |
| CQ 160m SSB | Feb 26–28 | Fri 22:00 | 48 | SSB | 36w |
| ARRL DX SSB | Mar 06–08 | Sat 00:00 | 48 | SSB | 37w |
| CQ WPX SSB | Mar 27–29 | Sat 00:00 | 48 | SSB | 40w |
| JIDX CW | Apr 10–11 | Sat 07:00 | 30 | CW | 42w |
| CQ WPX CW | May 29–31 | Sat 00:00 | 48 | CW | 49w |
| All Asian DX CW | Jun 19–21 | Sat 00:00 | 48 | CW | 52w |
Contest Weekend Recaps¶
Post-contest propagation analysis — band activity, solar impact, geographic reach. Each recap includes a full Jupyter notebook and downloadable SQLite dataset.
- ARRL DX SSB 2026 — Storm onset during contest (Kp 1.0 → 4.67)
- ARRL DX CW 2026 — SSN dropped to zero during G1 storm
DXpeditions¶
See the DXpeditions page for upcoming DXpedition tracking with IONIS band predictions.
Logger Statistics¶
Which logging software do contesters use? See the Logger Statistics page for market share data from 496K+ Cabrillo log submissions — N1MM dominates at 45%, but macOS and Linux have essentially zero contest logger presence.
About This Calendar¶
Contest dates are computed from fixed scheduling rules — "last full weekend of October," "first full weekend of March," etc. The rules rarely change. A YAML file plus Python date math produces a calendar that stays current without manual updates.
"Full weekend" means both Saturday and Sunday fall within the named month. Some contests start Friday evening (CQ 160m, ARRL 160m). Durations range from 24 hours (IARU, SAC, Oceania) to 48 hours (CQ WW, WPX).
Predictions use IONIS V22-gamma — a physics-constrained neural network trained on 14 billion real propagation observations. They reflect current solar conditions and update every 3 hours.