"Sat, 21 Dec 2024 20:18:04"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
20:18:04
General datetime
2024-12-21 20:18:04Z
For Database
2024-12-21 20:18:04
For HTTP1.1
Sat, 21 Dec 2024 20:18:04 GMT