C# Epoch time to date and timezone convertion -

what way convert epoch time date, using specific timezone

i need check 2 dates. 1 date have in database , in x website.

i know both dates same in relation of yyyy-mm-dd

in example:

database date is: 1398891600 = 2014-05-01

x website date is: 1398902400000 = 2014-05-01

c# code "converter"

private string datechecker_inepoch(string epochdate)         {             if (epochdate.length < 13)             {                 epochdate = epochdate + "000";             }             datetime dt = new datetime(1970, 1, 1, 0, 0, 0).addmilliseconds(convert.todouble(epochdate));              string dateformated = dt.tostring("yyyy-mm-dd");              return dateformated;          } 

issue when convert using method 1 db date 2014-04-30 , website date 2014-05-01.

i tested dates using http://www.epochconverter.com/

database date is: 1398891600 = 2014-05-01

x website date is: 1398902400000 = 2014-05-01

epochconverter.com gives me following results:

1398891600000 -> wed, 30 apr 2014 21:00:00 gmt

1398902400000 -> thu, 01 may 2014 00:00:00 gmt

so code seems consistent epochconverter.com.

with regards timezones, make sure dates stored/retrieved using utc. save lot of headaches when comes converting to/from different timezones. in case, assuming epoch stored relative utc date, following:

datetime dt = new datetime(1970, 1, 1, 0, 0, 0, datetimekind.utc).addmilliseconds(convert.todouble(epochdate)); 

you can use following if need display local time end user:

utcdate.tolocaltime();