Given DateTime In CEST (Germany), Need To Know EST Time (Including DST)

Question

I'm writing a C# Windows service that opens a text file that has a date and time column. Both of these are in CEST time in Germany. I need to know what these times are in EST. I don't know how to factor in the daylight savings time on both sides as well. Can someone please guide me with this? I have no idea how.

lsRetrievedDateTime = cellvalues[10] + " " + cellvalues[11];
ldRetrievedDateTimeCEST = DateTime.ParseExact(MyDateString, "M/dd/yyyy H:mm:ss", null);

//  ldRetrievedDateTimeCEST is actually Germany time and we need to convert it to EST.

[Took me 2 seconds to google](https://docs.microsoft.com/en-us/dotnet/standard/datetime/converting-between-time-zones) — TJ Wolschon, Apr 24 '18 at 17:49
Be aware, `DateTime` itself doesn't keep time zone information. If you _really_ wanna deal with time zones, I suggest you to use [NodaTime](https://nodatime.org/) instead. — Soner Gönül, Apr 24 '18 at 17:51
@TJWolschon, this includes DST adjustments as well? How do I start with CEST and not UTC to convert to EST? — Andy, Apr 24 '18 at 18:01

score 0 · Answer 1 · answered Apr 24 '18 at 18:25

You can use TimeZoneInfo and DateTimeOffset

lsRetrievedDateTime = cellvalues[10] + " " + cellvalues[11];
ldRetrievedDateTimeCEST = DateTime.ParseExact(MyDateString, "M/dd/yyyy H:mm:ss", null)    
//Create a TimeZoneInfo Object and set TimeZone
var info = TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time");
//Create DateTimeOffSet object with TimeZoneInfo and DateTime as parameters.

DateTimeOffset est_time = TimeZoneInfo.ConvertTime(ldRetrievedDateTimeCEST , info);

//Now you can use est_time

MessageBox.Show(est_time.ToString()); //will return EST time.

For diferent TimeZones you can check this question

Good Luck.

Given DateTime In CEST (Germany), Need To Know EST Time (Including DST)

1 Answers1