"Fri, 23 Jan 1970 07:47:53"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700123
Only TIME
07:47:53
General datetime
1970-01-23 07:47:53Z
For Database
1970-01-23 07:47:53
For HTTP1.1
Fri, 23 Jan 1970 07:47:53 GMT