"Fri, 16 Jan 1970 07:38:52"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700116
Only TIME
07:38:52
General datetime
1970-01-16 07:38:52Z
For Database
1970-01-16 07:38:52
For HTTP1.1
Fri, 16 Jan 1970 07:38:52 GMT