"Sat, 15 Jun 2024 19:16:13"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240615
Only TIME
19:16:13
General datetime
2024-06-15 19:16:13Z
For Database
2024-06-15 19:16:13
For HTTP1.1
Sat, 15 Jun 2024 19:16:13 GMT