All birthdays mismatch -1 day on iPhone

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    I am administering ALL contacts in Outlook on PC. After synching with in Akruto I find that ALL birthdays mismatch on iPhone for -1 day.

    Example: My daughter’s birthday is Dec, 14. In Outlook on PC this is fine, and after synching the Acruto log also says correctly “Birthday 1997-12-14 00:00:00”.

    However, on iPhone (latest OS 13.3) the birthday shows as 1997-12-13. And this error (-1 day) shows on ALL birthdays with ALL contacts synced via Acruto.



    Akruto Support


    Hello Kai,

    Shifting of appointments into the next or previous day is caused by some kind of timezone mismatch. Unfortunately, there are many timezones that come into play. Your computer and your phone both have a timezone. Also, Outlook has a default timezone. And each appointment can have its own timezone, which you can see in Outlook when you open the appointment. They all have to match.

    By match, I do not just mean the offset from UTC, but rather the exact same timezone. For example, Israel Standard Time and Eastern European time are both UTC+2hours, but they are not the same timezone, because they have different DST rules. You need to make sure to use the same timezone. Also check if DST is turned on/off

    It may be a bit surprising that appointments shift only from Outlook to the phone, but not from phone to Outlook. This is because the differences between Microsoft’s implementation and your phone’s operating system implementation. For example, Microsoft’s implementation notices that the appointment is all-day and makes it fit into the closest day while Android pays more attention to the exact time, rather than the all-day flag.

    If you confirm that all timezones match, but you are still experiencing the problem, please send an email to and attach an appointment that does not sync correctly. To do this, drag the appointment from Outlook to a folder on your PC. This will create an appointment file on your PC. Then put it in a zip file (this is important!) and send as an attachment. Also, please send us a screenshot of this appointment in Outlook and on the phone.

    Raphael Gonzales
    Technical Support Specialist

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