🌕 Discover the 13-Month Calendar

Our current calendar, with its irregular months and arbitrary names, was shaped by empires and power. Year Zero invites us to reconnect time with nature — and with ourselves.

🌀 The Structure

• 13 months, each with 28 days
• 364 days + 1 “zero day” to realign with the solar year (placed on the winter solstice)
• Every month begins on the same weekday
• The rhythm is clear, simple, and cyclical

🌙 Why 13 Months?

The Moon completes ~13 orbits per solar year. Each 28-day month echoes lunar rhythms — menstruation, sleep, tides, biology.

Instead of dividing time into fragments of power, we return to a circle of time.

📆 Overview

• 12 × 28 = 336 days
• + 1 more month = 364 days
• + 1 neutral day (Zero Day) = 365 (solar alignment)

🌟 The Zero Day

The Zero Day is a celebration, not a deadline. A moment of pause, of gratitude, of unity. It takes place at the winter solstice — when light begins to return.

🔧 The Zero Day Completing the Solar Year

The solar year lasts approximately 365.24 days — slightly longer than our proposed 13-month cycle (13 × 28 = 364 days).

To remain aligned with Earth’s revolution around the sun, we introduce neutral day(s) outside the regular months:

• 1 Neutral Day every year, placed on the winter solstice (December 21), called Zero Day
• 1 additional day every 4 years (like a leap year) to account for the remaining quarter-day

These days are not part of any week or month. They stand apart — like breath between cycles.

Zero Day and its occasional companion are moments of reflection, unity and transition — celebrated as global time out of time.

🪐 Naming the Months

We’re currently exploring names for each of the 13 months — perhaps inspired by planets, moons, or universal values. You can take part in this process soon.

🧭 Universal, Not Religious

This calendar does not belong to any religion, empire or region. It’s a proposal for all humanity, starting with Year Zero = 2028 — the year we symbolically begin again.

🧮 Try the Birthday Converter →

“What if time served life — not the other way around?”