"Sat, 15 Jun 2024 23:45:13"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240615
Only TIME
23:45:13
General datetime
2024-06-15 23:45:13Z
For Database
2024-06-15 23:45:13
For HTTP1.1
Sat, 15 Jun 2024 23:45:13 GMT