2023 Unix Timestamps
Unix timestamps for the start of each month in 2023. January 1, 2023 00:00:00 UTC = 1672531200.
January 2023 (local)Jan 1, 2023, 12:00:00 AM UTC
1,672,531,200s
February 2023 (local)Feb 1, 2023, 12:00:00 AM UTC
1,675,209,600s
March 2023 (local)Mar 1, 2023, 12:00:00 AM UTC
1,677,628,800s
April 2023 (local)Apr 1, 2023, 12:00:00 AM UTC
1,680,307,200s
May 2023 (local)May 1, 2023, 12:00:00 AM UTC
1,682,899,200s
June 2023 (local)Jun 1, 2023, 12:00:00 AM UTC
1,685,577,600s
July 2023 (local)Jul 1, 2023, 12:00:00 AM UTC
1,688,169,600s
August 2023 (local)Aug 1, 2023, 12:00:00 AM UTC
1,690,848,000s
September 2023 (local)Sep 1, 2023, 12:00:00 AM UTC
1,693,526,400s
October 2023 (local)Oct 1, 2023, 12:00:00 AM UTC
1,696,118,400s
November 2023 (local)Nov 1, 2023, 12:00:00 AM UTC
1,698,796,800s
December 2023 (local)Dec 1, 2023, 12:00:00 AM UTC
1,701,388,800s
Start of 2024 (year-end boundary, local)Jan 1, 2024, 12:00:00 AM UTC
1,704,067,200s
2023 year boundaries
Start of 2023: 1672531200 (January 1, 2023 00:00:00 UTC). Start of 2024 (exclusive year-end boundary): 1704067200. 2023 is a common year with 365 days.
Quarter and half-year boundaries
Quarter and half-year boundaries for 2023 in UTC. Use these for quarter-over-quarter reports, fiscal queries, and BI dashboards. All values are seconds since the Unix epoch.
- Q1 start (Jan 1): 2023-01-01 00:00:00 UTC = 1672531200
- Q2 start (Apr 1): 2023-04-01 00:00:00 UTC = 1680307200
- H1 end / Q3 start (Jul 1): 2023-07-01 00:00:00 UTC = 1688169600
- Q4 start (Oct 1): 2023-10-01 00:00:00 UTC = 1696118400
- Year end (Dec 31 23:59:59): 2023-12-31 23:59:59 UTC = 1704067199
- Next year start (Jan 1, 2024): 1704067200
Code: get the start and end of 2023 as epoch
One-liners for computing year boundary timestamps in popular languages. All return UTC seconds; multiply by 1000 for milliseconds.
- JavaScript: Math.floor(Date.UTC(2023, 0, 1) / 1000) // → 1672531200
- Python: int(datetime(2023, 1, 1, tzinfo=timezone.utc).timestamp()) // → 1672531200
- Go: time.Date(2023, 1, 1, 0, 0, 0, 0, time.UTC).Unix() // → 1672531200
- Java: ZonedDateTime.of(2023, 1, 1, 0, 0, 0, 0, ZoneOffset.UTC).toEpochSecond()
- PostgreSQL: SELECT EXTRACT(EPOCH FROM '2023-01-01 00:00:00 UTC'::timestamptz)::bigint
- SQL Server: DATEDIFF_BIG(SECOND, '1970-01-01', '2023-01-01')
- Shell (Linux): date -u -d '2023-01-01 00:00:00 UTC' +%s
Notable dates in 2023
Common reference moments in 2023 in UTC seconds. Useful for testing range queries, charting historical events, and verifying DST transitions.
- January 1, 2023 00:00 UTC (year start): 1672531200
- US DST starts — second Sunday of March 07:00 UTC: 1679209200 (02:00 EST → 03:00 EDT)
- US DST ends — first Sunday of November 06:00 UTC: 1699164000 (02:00 EDT → 01:00 EST)
- December 31, 2023 23:59:59 UTC (year end, inclusive): 1704067199
- Days in 2023: 365 (common year — no Feb 29)
- ISO week 1 begins on the Monday of the week containing Jan 4, 2023