What if I get an input box, hit the "Get Calendar" button but NOTHING happens??.

God's Holy Days 2000-2022

Holy Day Calendar 2.0

2022-2023 Hebrew Calendar - Free PDF Download by Slade Keifman - Updated

Hebrew Calendar Video Series

Customized Calculated Hebrew Calendar w/scripture available.

E-mail William @ and leave your name, phone number or e-mail address, or call 702-240-2842 to inquire.

Is God's Calendar Based on the New Moon Days?

Postponement Rules - Printable

NOTE: If you see only the "Holy Day Calendar . . ." title in the above box, or if the title and only a gray-colored box appears, you need to download the latest free Java Plug-in for your browser.

For PCs with a Microsoft Windows system (Windows 98/98SE/ME/2000/XP), click on this link to download the Java plug-in. Once on your computer, double-click on the file to begin installation of plug-in. If you are using an Apple/Mac computer,click on this link to download the plug-in directly from their site.

This Holy Day Calendar Program is both a tool for in-depth Biblical research and a quick, easy means to look up future dates for God's days of worship. Some of the capabilities of this program are:
  • Displays and allows Printing of calendar delineating the dates of God's Biblical Holy Days for ANY year from 3761 BC (the Hebrew year of creation) well into the future!

  • Explains the four postponements rules used to determine Tishri 1 (the first day of the Hebrew new year) and offers basic definitions of important Hebrew calendar concepts.

  • The program can accept either a Julian/Gregorian (Roman Format) or Hebrew year as input, from which it can:

    1. Calculate the occurrence of the Molad (average conjunction of moon with earth and sun) of Tishri for the Hebrew year.
    2. Show which postponement rules (if any) were used to determine Tishri 1 for the Hebrew year.
    3. Determine which year out of the 19-year lunar cycle the Hebrew year is.
    4. Calculate the number of days in the upcoming Hebrew year.
  • Outputs a detailed one-month calendar showing the Hebrew/Roman date pairs for ANY desired Roman or Hebrew month!
  • And MORE!
The Holy Day Calendar Program is a JAVA programming language-based project undertaken byBibleStudy.org/Alan Ruth, under the direction of Carl Franklin, for the Christian Biblical Church of God. This program is © 2003, Christian Biblical Church of God.