13 Moons
The Equinox Calendar is a 13-month, 28-day system aligned with nature, simplicity, and human rhythm.
13 Month Calendar
The Equinox Calendar begins on March 20, the spring equinox, symbolising renewal and balance.
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13 months
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28 days each
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364 structured days
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1 “Year Day” outside time
Why it matters:
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Every date falls on the same weekday
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Perfect for planning and productivity
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Aligns with natural seasonal cycles
Calendar Year Layout
Month 1 — March 20 → April 16
1–28
Month 2 — April 17 → May 14
1–28
Month 3 — May 15 → June 11
1–28
Month 4 — June 12 → July 9
1–28
Month 5 — July 10 → August 6
1–28
Month 6 — August 7 → September 3
1–28
Month 7 — September 4 → October 1
1–28
Month 8 — October 2 → October 29
1–28
Month 9 — October 30 → November 26
1–28
Month 10 — November 27 → December 24
1–28
Month 11 — December 25 → January 21
1–28
Month 12 — January 22 → February 18
1–28
Month 13 — February 19 → March 18
1–28
End-of-Year Day
March 19 — “Year Day”
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Not part of any week
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Celebration / renewal day
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Next day begins Month 1 (March 20) again.
💡 Advantages of this system
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Every date falls on the same weekday every year
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Perfect 4-week months
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Simplifies scheduling, accounting, and events
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Easy to align with seasonal cycles starting at the equinox
⭐ Benefits of This Calendar
✔ Every month identical (4 weeks)
✔ Same dates always fall on the same weekday
✔ Perfect for events, planning, and organisations
✔ Aligned with the natural seasonal cycle beginning at the spring equinox
