"Sat, 21 Dec 2024 18:18:42"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
18:18:42
General datetime
2024-12-21 18:18:42Z
For Database
2024-12-21 18:18:42
For HTTP1.1
Sat, 21 Dec 2024 18:18:42 GMT