"Sat, 03 Jan 1970 12:55:41"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700103
Only TIME
12:55:41
General datetime
1970-01-03 12:55:41Z
For Database
1970-01-03 12:55:41
For HTTP1.1
Sat, 03 Jan 1970 12:55:41 GMT