"Sat, 15 Jun 2024 20:19:38"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240615
Only TIME
20:19:38
General datetime
2024-06-15 20:19:38Z
For Database
2024-06-15 20:19:38
For HTTP1.1
Sat, 15 Jun 2024 20:19:38 GMT