Daylight saving time and UTC

Question

Can someone confirm that by using UTC date storage in lists it can cause problems after summer time ends?

I'm in the UK and during the summertime I was in UTC+1.

So when i saved a date field using the default UI on a list which stores this data as UTC, the values were the following:

Input: 2015-10-10 15:00:00 Stored: 2015-10-10 14:00:00 Output: 2015-10-10 15:00:00

Now summertime is over and i'm in UTC+0 again. This field show's a wrong value: 2015-10-10 14:00:00.

Am i missing something, or this is the correct behavior? Dates stored during daylight saving time will always show one hour off after DTS ended?

Answer 1

You are applying the standard-time offset for a date that's in daylight time. The offset should be tied to the date and time being converted, not to the current time.