"Sat, 15 Jun 2024 12:34:56"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240615
Only TIME
12:34:56
General datetime
2024-06-15 12:34:56Z
For Database
2024-06-15 12:34:56
For HTTP1.1
Sat, 15 Jun 2024 12:34:56 GMT