"Sat, 21 Dec 2024 14:37:19"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
14:37:19
General datetime
2024-12-21 14:37:19Z
For Database
2024-12-21 14:37:19
For HTTP1.1
Sat, 21 Dec 2024 14:37:19 GMT