[ACCEPTED]-C#: Making sure DateTime.Now returns a GMT + 1 time-timezone
Use the TimeZoneInfo class found in System.Core;
You 2 must set the DateTimeKind to DateTimeKind.Utc 1 for this.
DateTime MyTime = new DateTime(1990, 12, 02, 19, 31, 30, DateTimeKind.Utc);
DateTime MyTimeInWesternEurope = TimeZoneInfo.ConvertTimeBySystemTimeZoneId(MyTime, "W. Europe Standard Time");
Only if you're using .Net 3.5 though!
It depends on what you mean by "a GMT 19 + 1 timezone". Do you mean permanently 18 UTC+1, or do you mean UTC+1 or UTC+2 depending 17 on DST?
If you're using .NET 3.5, use TimeZoneInfo to 16 get an appropriate time zone, then use:
// Store this statically somewhere
TimeZoneInfo maltaTimeZone = TimeZoneInfo.FindSystemTimeZoneById("...");
DateTime utc = DateTime.UtcNow;
DateTime malta = TimeZoneInfo.ConvertTimeFromUtc(utc, maltaTimeZone );
You'll 15 need to work out the system ID for the Malta 14 time zone, but you can do that easily by 13 running this code locally:
Console.WriteLine(TimeZoneInfo.Local.Id);
Judging by your 12 comments, this bit will be irrelevant, but 11 just for others...
If you're not using .NET 10 3.5, you'll need to work out the daylight 9 savings yourself. To be honest, the easiest way 8 to do that is going to be a simple lookup 7 table. Work out the DST changes for the 6 next few years, then write a simple method 5 to return the offset at a particular UTC 4 time with that list hardcoded. You might 3 just want a sorted List<DateTime> with the known changes 2 in, and alternate between 1 and 2 hours 1 until your date is after the last change:
// Be very careful when building this list, and make sure they're UTC times!
private static readonly IEnumerable<DateTime> DstChanges = ...;
static DateTime ConvertToLocalTime(DateTime utc)
{
int hours = 1; // Or 2, depending on the first entry in your list
foreach (DateTime dstChange in DstChanges)
{
if (utc < dstChange)
{
return DateTime.SpecifyKind(utc.AddHours(hours), DateTimeKind.Local);
}
hours = 3 - hours; // Alternate between 1 and 2
}
throw new ArgumentOutOfRangeException("I don't have enough DST data!");
}
I don't think that you can set a property 9 in your code that will make DateTime.Now 8 return anything else than the current time 7 of the computer in which the code executes. If 6 you want to have a way of always getting 5 another time, you will probably need to 4 wrap in another function. You can can do 3 the round-trip over UTC and add the desired 2 offset:
private static DateTime GetMyTime()
{
return DateTime.UtcNow.AddHours(1);
}
(code sample updated after Luke's 1 comment on the inner workings of DateTime.Now)
More Related questions
We use cookies to improve the performance of the site. By staying on our site, you agree to the terms of use of cookies.