"Fri, 16 Jan 1970 15:05:52"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700116
Only TIME
15:05:52
General datetime
1970-01-16 15:05:52Z
For Database
1970-01-16 15:05:52
For HTTP1.1
Fri, 16 Jan 1970 15:05:52 GMT