Crm stores all datetime values in UTC time in the database. When a Crm user accesses the data via Crm it will display it in the timezone of that user. Similarly, when a user enters a datetime value, Crm will take that in the user's timezone, and convert
it to UTC to store it.
In the example you've given, the user is probably in British Summer Time, which is one hour ahead of UTC.
Note that, if you access the data via the filtered views in SQL, the filtered view will do the conversion to the user's timezone
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