"Sat, 18 May 2024 12:33:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240518
Only TIME
12:33:20
General datetime
2024-05-18 12:33:20Z
For Database
2024-05-18 12:33:20
For HTTP1.1
Sat, 18 May 2024 12:33:20 GMT