Asp.Net Membership System Last Activity Date in the future

I'm using the ASP.Net Membership system but I'm having an issue with the LastActivityDate fo开发者_开发问答r the users in the database. For some users, their last activity date is in the future... Definitely not supposed to happen. Any thoughts?

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Looking at the source code for the Sql Membership Provider, it uses UTC time:

cmd.Parameters.Add(CreateInputParam("@CurrentTimeUtc", SqlDbType.DateTime, DateTime.UtcNow));

I would check the time difference between DateTime.UtcNow and your local time and see if that explains it.

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Check the date/time of the server?

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Maybe Timezone/DST-related problem? How much in the future your users seem to be? :)