Gregorian to Julian Date Converter
Convert from Gregorian to Julian: enter a date below and see it in the Julian calendar. The table further down lists the first day of every month of Gregorian year 2026 alongside the Julian date.
Today
Convert a Date
Loading calendars...
Gregorian months in 2026
The first day of every Gregorian month, with the Julian date for the same day.
| Gregorian | Julian |
|---|---|
| 1 January 2026 | 19 December 2025 |
| 1 February 2026 | 19 January 2026 |
| 1 March 2026 | 16 February 2026 |
| 1 April 2026 | 19 March 2026 |
| 1 May 2026 | 18 April 2026 |
| 1 June 2026 | 19 May 2026 |
| 1 July 2026 | 18 June 2026 |
| 1 August 2026 | 19 July 2026 |
| 1 September 2026 | 19 August 2026 |
| 1 October 2026 | 18 September 2026 |
| 1 November 2026 | 19 October 2026 |
| 1 December 2026 | 18 November 2026 |
About these calendars
Gregorian
The Gregorian calendar is the most widely used civil calendar in the world. Introduced by Pope Gregory XIII in 1582 as a reform of the Julian calendar, it corrected the drift in the date of Easter by refining the leap year rule. It is a solar calendar with 365 days in a common year and 366 in a leap year.
Used in: Worldwide
Julian
The Julian calendar was introduced by Julius Caesar in 46 BCE as a reform of the Roman calendar. It established the 365-day year with a leap day every four years, but its slight overestimate of the solar year caused it to drift by about 13 days relative to the Gregorian calendar. It is still used by some Eastern Orthodox churches to calculate feast days.
Used in: Eastern Orthodox churches, historical usage