I have a custom sharepoint list which has a column with type date.

I am grouping the list according to date field in a view.

This was working until this Saturday.

For the days before 26.10.2007 are grouped correctly but for the dates after
26.10.2007

Grouped days are one day before the typed in date.

For example:

Data:

24.10.2007 a1

24.10.2007 b1

25.10.2007 c1

25.10.2007 d1

26.10.2007 e1

26.10.2007 f1

27.10.2007 g1

27.10.2007 h1

is grouped as follows

24.10.2007

a1

b1

25.10.2007

c1

d1

e1

f1

26.10.2007

g1

h1

although it is supposed to be grouped as follows:

24.10.2007

a1

b1

25.10.2007

c1

d1

26.10.2007

e1

f1

27.10.2007

g1

h1

Anyone has an idea why this can be?

By the way English version of sharepoint 2007 is installed and we are in the
region Turkey (GMT +2).