I am using surface pro 4 (denoted SP4 henceforth) as my main laptop, and have set up a windows 7 desktop as my main device in my office.

When trying to sync my schedule from the Calendar app of SP4 using the windows live mail's calendar function (since windows 7 apparently does not support the calendar app on its own), the dates of the existing schedules get muddled up - some of the dates are shifted by one day (e.g. Tuesday's schedule gets moved to Monday etc). All my schedule is under my outlook account, but only SOME of the dates are shifted, and I had to go through the excruciating process of manually correct the errors.

Could you please suggest a cause and/or the solution to this problem?

Thanks!