"Sat, 21 Dec 2024 15:35:40"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
15:35:40
General datetime
2024-12-21 15:35:40Z
For Database
2024-12-21 15:35:40
For HTTP1.1
Sat, 21 Dec 2024 15:35:40 GMT