Returning to Rhythm

A solar calendar. Your daily frequency. One app.

Download Calendar & Guide

What is SOL Rhythm?

SOL Rhythm is a structured daily rhythm system designed to support nervous system regulation.

Consistent alignment with natural solar rhythm supports improved sleep, sustained energy, and greater daily coherence.

Shifting to a 13-cycle solar calendar begins the shift.

It doesn’t push you into a state.
It guides you back to rhythm.

SOL New Year
The 13 Cycle Solar Year Begins
Spring Equinox — 22 March 2026
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SOL Rhythm App

Coming 2026

The next phase of SOL Rhythm expands into a real-time solar tracking app designed for daily integration.

Features include:
• A consistent daily rhythm
• A stabilising frequency
• A simple check-in

Read it, listen, let it go.

The calendar anchors the structure.
The app brings it to life.

Join the waitlist to access the full system.

Join App Waitlist
Download Calendar & Guide

Calendar users receive priority app access upon release.

Frequently Asked Questions

Everything you need to know about Sol Rhythm and the 13 cycle solar calendar.

  • The sun is the most stable, universally shared biological timing system on Earth. Solar rhythm governs circadian regulation, hormonal cycles, seasonal energy, and biological pacing. It is astronomically fixed and mathematically repeatable.

  • Consistent alignment with natural solar rhythm supports nervous system regulation, improved sleep, sustained energy, and greater daily coherence. Sol Rhythm provides the framework. Your body does the rest.

  • Yes. The system is grounded in chronobiology — the scientific study of biological rhythms and their relationship to natural time cycles.

  • 13 cycles of 28 days equals 364 days. The remaining day — 21 March — sits outside the cycle as the Day Out of Time. A single day of pause before the new solar year begins on 22 March.

  • The Spring Equinox marks the moment the sun crosses the celestial equator — the most astronomically precise and globally shared moment in the solar year.

  • No. Sol Rhythm is not an astrological system. No star signs, no birth charts, no prediction. It is based entirely on fixed astronomical mathematics.

  • SOL Rhythm uses sidereal solar movements as its foundational reference point — providing a more astronomically precise framework than standard solar calculation alone.

  • SOL Frequencies provide a harmonic state that supports internal coherence and nervous system regulation.