"Sat, 15 Jun 2024 15:59:09"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240615
Only TIME
15:59:09
General datetime
2024-06-15 15:59:09Z
For Database
2024-06-15 15:59:09
For HTTP1.1
Sat, 15 Jun 2024 15:59:09 GMT