Julian Date, Julian Day Number and ΔT Table Calculator BC 9999-Mar-16-Sat to AD 9999-Dec-30-Thu PHP Program By Jay Tanner - 2025 - Built Around the NASA/JPL Horizons API
Start Date BC|AD Year-Month-Day	Stop Date BC|AD Year-Month-Day
Double-Click Within Text Area to Select ALL Text ============================================================================== JULIAN DATE, JULIAN DAY NUMBER and DELTA−T (TDB − UT) TABLE CALCULATOR 00:00:00 UT ON EACH DATE   Calendar_Date J_Date JD_Num Delta_T dd hh:mm:ss = Seconds ================== ========== ======== ===================================== AD 2025-Feb-23-Sun 2460729.5 2460730 +0d 00:01:09.185257 +69.185257 ================== ========== ======== =====================================   Calendar_Date J_Date JD_Num Delta_T dd hh:mm:ss = Seconds

Double-Click Within Text Area to Select ALL Text

Program by Jay Tanner v1.00 - Revised: 1970-January-01-Thursday at Local Time 12:00:00 AM (UTC−05:00)