"Sat, 21 Dec 2024 16:39:19"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
16:39:19
General datetime
2024-12-21 16:39:19Z
For Database
2024-12-21 16:39:19
For HTTP1.1
Sat, 21 Dec 2024 16:39:19 GMT