"Fri, 16 Jan 1970 04:40:49"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700116
Only TIME
04:40:49
General datetime
1970-01-16 04:40:49Z
For Database
1970-01-16 04:40:49
For HTTP1.1
Fri, 16 Jan 1970 04:40:49 GMT