Julian Date Calendars
AAVSO-produced JD Calendars give the last four digits of the Julian Day for each day of every month for a year. The months January-June are on one page while July–December are on the second page. For the complete JD, add 2,460,000 (or 2,450,000 if using a calendar dating from before February 23, 2023) to the four-digit value given in the calendar for the Astronomical Day of your observation.
Click on a year in the left column to download a 2-page .pdf version of the calendar for that year. The calendar for 2026 is shown below. Click on the image below to get a bigger version.