"Sun, 15 Dec 2024 23:16:19"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241215
Only TIME
23:16:19
General datetime
2024-12-15 23:16:19Z
For Database
2024-12-15 23:16:19
For HTTP1.1
Sun, 15 Dec 2024 23:16:19 GMT