ToLocalTime shows wrong time

Question

I am running a website in IIS on my local PC, I save a date as UTC and call .ToLocalTime() on it in the front end mvc website. If I run the website on my local PC it outputs the correct date and time adjusted for DST. If I run it in Azure in region UK West I get 1 hour behind. This hasn't been an issue until today i.e. the clocks changed on Saturday. Do I need to raise a ticket with Azure? Or am I doing it wrong?

If it is helpful, please mark it as answer that will help more communities. — Tom Sun - MSFT, Mar 30 '17 at 07:00

score 1 · Accepted Answer · edited May 23 '17 at 12:25

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Azure App server is using UTC time. If your site is not global just for UK. We can use the following code to get the UK local time.

DateTime utcNow = DateTime.UtcNow;
TimeZoneInfo tz = TimeZoneInfo.FindSystemTimeZoneById("GMT Standard Time"); //UK time zone
DateTimeOffset  time = TimeZoneInfo.ConvertTimeFromUtc(utcNow, tz);
lab_time.Text = time.DateTime.ToString(CultureInfo.InvariantCulture); //display the datetime with label.

If your website is to be global that you may need to use javascrpt to do that, more detail please refer to another SO Thread.

edited May 23 '17 at 12:25

Community

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answered Mar 29 '17 at 05:19

Tom Sun - MSFT

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Yes, site is UK only, is there anyway I can set it globally for the entire application? – johnstaveley Mar 29 '17 at 09:16
As I mentioned that we need to use javascript to do that. Based on my experience, we can't get the globally local timezone from the server backend. – Tom Sun - MSFT Mar 29 '17 at 09:30

score 0 · Answer 2 · answered Mar 27 '17 at 08:49

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Time-zone depends on the the server location literally.

I had faced the same issue. I had my server in Singapore and it used to clash with my zone, India.

It would affect the time and date formats too.

So, Better not use the ToLocalTime() at the server side. just get the UTC time from the server and convert to whatever local time at the client side. Issue resolved!

Hope this helps. Thank you.

answered Mar 27 '17 at 08:49

Prashanth Benny

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Ok, but my server is in the UK, so should be no problem? – johnstaveley Mar 27 '17 at 08:55
But when the time changes, I have no idea what they do at Azure. And, if your website is to be global, it would be a problem! – Prashanth Benny Mar 27 '17 at 08:58
Actually I am not sure this is true. My UK Azure instance runs in utc and my qa and production servers (both in UK) run in GMT so server location isn't the issue – johnstaveley Mar 30 '17 at 10:43

ToLocalTime shows wrong time

2 Answers2