"Sat, 15 Jun 2024 08:39:12"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240615
Only TIME
08:39:12
General datetime
2024-06-15 08:39:12Z
For Database
2024-06-15 08:39:12
For HTTP1.1
Sat, 15 Jun 2024 08:39:12 GMT