Status: beta

Time zone and epoch converter

Leap-second aware conversion between UTC, GPS time, Julian dates, and Excel serial dates.

timekeeping
time
utilities

Timestamp (ISO, supports leap seconds)Target time zone

Unix & System Time

64-bit (Dec): 1773000326
64-bit (Hex): 0x0000000069ADD686
32-bit Signed: 1773000326
32-bit Unsigned: 1773000326
JS Timestamp (ms): 1773000326004

Protocol Timestamps & Eras

Unix (Posix):
1773000326s
GPS (System):
1457035544s
NTP (Network):
3981989126s
Cocoa (Apple):
794693126s
Windows FileTime:
134174739260040000100ns

NTP Era: 0
Rollover: Feb 7, 2036
GPS Rollover: 2
1024-week period
TAI / PTP:
1773000363.004 (TAI)

World & Culture Calendars

Islamic (Hijri): Ramadan 19, 1447 AH
Hebrew: 19 Adar 5786
Persian: Esfand 17, 1404 AP
Indian National: Phalguna 17, 1947 Śaka
Ethiopic: Yekatit 29, 2018 AM
Bengali (Revised): 23 Falgun 1432 BE
Bengali (Traditional): 22 Falgun 1432 BE

Esoteric & Fiction

Mars Sol Date: 98895.08272
TNG Era: -296816.88
i
24th-century system. 1000 units per year. 2323.0 = 0.
TOS (Original): -238816.4
i
23rd-century system. Highly variable (~1000 units/year).
Kelvin Timeline: 2026.183
i
Format: YYYY.nnn where nnn is year progress (0-999).

Calendar History

ISO 8601: 2026-03-08(Proleptic Greg.)
Historical: 8 Mar 2026 (Gregorian N.S.)
Julian: 23 Feb 2026 AD(Proleptic)
Holocene: 12026 HE

Standard Formats

ISO Week: 2026-W10-7
Ordinal: 2026-067
Decimal Yr: 2026.183115
Swatch: @878

Julian Day Number (JD)

JD Number: 2461108.337107
Modified JD: 61107.837107
Truncated JD: 21107.837107

Excel Serial Dates

1900 system: 46089.837107
1904 system: 44627.837107

Days Since Epoch (Reference)

Unix: +20520.8

GPS: +16863.8

J2000.0: +9563.3

NTP: +46087.8

Lilian: +161947.8

ANSI: +155294.8

Cocoa: +9197.8