Midwinter → Vernal Equinox
- Midwinter's Day 21/12
- Christmas 25/12
- Epiphany 06/01
- Hen Galan 14/01
- Lá Fhéile Bríde / Imbolc 01/02
- Dydd Dewi Sant 01/03
Vernal Equinox → Midsummer
- Vernal Equinox 21/03
- Holy Week/Easter (Variable date)
- Calan Mai / Bealtine 01/05
Midsummer → Autumnal Equinox
- Midsummer's Day 21/06
- Calan Awst / Lúnasa 01/08
- St. Hildegarde's Day 17/09
Autumnal Equinox → Midwinter
- Autumnal Equinox 21/09
- All Saints' / Calan Gaeaf / Samhain 01/11