How to convert DateTime to Eastern Time

Question

I\'m trying to create an application that triggers some code when the financial markets are open. Basically in pseudo code:

if(9:30AM ET < Time.Now < 4         


        

Answer 1

You need to split up the logic into two;

• Check if date is more than start date, startTime > now
• Check if date is less than end date, endTime < now

For a date range the logic should satisfy both (with logical AND, &&).

DateTime startTime = DateTime.Today.AddHours(9).AddMinutes(30);
DateTime endTime = DateTime.Today.AddHours(12+4);
DateTime now = DateTime.Now;
if(startTime > now && endTime < now) {
    // do something
}

If you're in ET timezone it should work fine, but otherwise you need to do some timezone manipulation. Check the other answers.

Answer 2

Try this:

var timeUtc = DateTime.UtcNow;
TimeZoneInfo easternZone = TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time");
DateTime easternTime = TimeZoneInfo.ConvertTimeFromUtc(timeUtc, easternZone);

Answer 3

You could probably use the ConvertTime method of the TimeZoneInfo class to convert a given DateTime to the Eastern timezone and do the comparison from there.

var timeToConvert = //whereever you're getting the time from
var est = TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time");
var targetTime = TimeZoneInfo.ConvertTime(timeToConvert, est);