"Sat, 21 Dec 2024 21:18:06"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
21:18:06
General datetime
2024-12-21 21:18:06Z
For Database
2024-12-21 21:18:06
For HTTP1.1
Sat, 21 Dec 2024 21:18:06 GMT