Babylon Persia · READ & EXPLORE

The calendar, the Moon and the reasons.

Understand Iran’s Solar Hijri calendar, Persian month names, published lunar dates and the calculation behind Tehran’s prayer clock. Read a guide, then explore the same questions in the live calendar.

Open Babylon Persia ↗

Six places to begin

Iranian calendar · Solar Hijri 1405

Iranian Calendar 1405: Persian Dates and Observances

Explore Iran’s 1405 Solar Hijri calendar, covering 21 March 2026–20 March 2027, with Persian months, published lunar dates and source-linked observances.

Read the companion guide ↗Farvardin to Esfand · Twelve Persian months

The 12 Persian Month Names: Order, Meanings and Dates

Learn the twelve Persian calendar months in order, with Persian spellings, historical associations and links to the Iranian 1405 calendar.

Read the companion guide ↗Same day · Different calendars

Solar Hijri vs Lunar Hijri: Two Calendars Explained

Understand the difference between Iran’s Solar Hijri calendar and the Islamic lunar Hijri calendar, and read both beside the Gregorian date.

Read the companion guide ↗Nowruz · 1 Farvardin 1405

Nowruz 1405: Iranian New Year Dates in 2026

Find Nowruz 1405 in Iran’s published calendar: 1 Farvardin on 21 March 2026, the first four holiday dates and links to the original calendar.

Read the companion guide ↗The Moon · The crescent · The date

The Moon and the Islamic Calendar: Phase, Crescent and Dates

Explore how lunar phases, crescent observation and published Islamic dates differ, with Babylon Persia’s Tehran Moon view and cited religious sources.

Read the companion guide ↗Tehran · Prayer times · Calculation method

Tehran Prayer Times: The Calculation Behind the Clock

Understand Babylon Persia’s calculated Tehran prayer timetable, its solar angles, Shi‘a reminder windows and live clock settings.

Read the companion guide ↗

Follow the connected studies.

Persian heritage: English orientation ↗Persian-script library · فارسی ↗Nowruz and renewal · guide in Persian ↗The Quran thesis: a comparative reading ↗Tav · the Moon ↗

Babylon Seasons · SIX COMPANION GUIDES

What season are you moving through?

Forming, expressing, releasing and reflecting: a seasonal language for human life. Begin with Vav · Bull, Tet · Lion, Nun · Eagle and Tzadi · Human / Water-Pourer, then explore the changing sky and source-linked accounts.

Read the Seasons guides ↗Open Babylon Seasons ↗