Date and time (ISO 8601, UTC) to Julian Date
Type a value in UTC to get it in JD instantly.
2454876.480208JD
That moment falls on a Friday, day 44 of 2009 (UTC).
Convert the other way: JD to UTC
What it means
Where is that on the timeline?
All dates are UTC. Unix time and these counts ignore leap seconds; Excel serials follow the 1900 date system and start at 1 March 1900.
The math
How to convert UTC to JD
date = 1970-01-01 00:00:00 UTC + timestamp seconds. Excel serial = Unix ÷ 86,400 + 25,569; Julian Date = Unix ÷ 86,400 + 2,440,587.5.
Example: 2009-02-13 23:31:30 UTC = 2454876.480208 JD.
Every unit
That moment in every format
Tables
UTC to JD conversion table
| UTC | JD |
|---|---|
| 2000-01-01 00:00:00 UTC | 2451544.5 JD |
| 2001-09-09 01:46:40 UTC | 2452161.574074 JD |
| 2004-11-09 11:33:20 UTC | 2453318.981481 JD |
| 2008-01-10 21:20:00 UTC | 2454476.388889 JD |
| 2011-03-13 07:06:40 UTC | 2455633.796296 JD |
| 2014-05-13 16:53:20 UTC | 2456791.203704 JD |
| 2017-07-14 02:40:00 UTC | 2457948.611111 JD |
| 2020-09-13 12:26:40 UTC | 2459106.018519 JD |
| 2023-11-14 22:13:20 UTC | 2460263.425926 JD |
| 2027-01-15 08:00:00 UTC | 2461420.833333 JD |
| 2030-03-17 17:46:40 UTC | 2462578.240741 JD |
| 2033-05-18 03:33:20 UTC | 2463735.648148 JD |
| 2038-01-19 03:14:07 UTC | 2465442.634803 JD |
JD to UTC conversion table
| JD | UTC |
|---|---|
| 2451545 JD | 2000-01-01 12:00:00 UTC |
| 2452162 JD | 2001-09-09 12:00:00 UTC |
| 2453319 JD | 2004-11-09 12:00:00 UTC |
| 2454476 JD | 2008-01-10 12:00:00 UTC |
| 2455634 JD | 2011-03-13 12:00:00 UTC |
| 2456791 JD | 2014-05-13 12:00:00 UTC |
| 2457949 JD | 2017-07-14 12:00:00 UTC |
| 2459106 JD | 2020-09-13 12:00:00 UTC |
| 2460263 JD | 2023-11-14 12:00:00 UTC |
| 2461421 JD | 2027-01-15 12:00:00 UTC |
| 2462578 JD | 2030-03-17 12:00:00 UTC |
| 2463736 JD | 2033-05-18 12:00:00 UTC |
| 2465443 JD | 2038-01-19 12:00:00 UTC |
Quick answers
Quick answers
- How many JD is 1970-01-01 00:00:01 UTC?
- 1970-01-01 00:00:01 UTC is 2440587.500012 JD.
- How many JD is 1970-01-01 00:00:10 UTC?
- 1970-01-01 00:00:10 UTC is 2440587.500116 JD.
- How many JD is 2009-02-13 23:31:30 UTC?
- 2009-02-13 23:31:30 UTC is 2454876.480208 JD.
The units
About these units
Date and time (ISO 8601, UTC) (UTC)
The date written as year-month-day and time, in UTC.
Julian Date (JD)
Days since noon on 1 January 4713 BC, used in astronomy.
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