SACRAMENTO (CBS13) – It’s the most important holiday in the Christian religion, but for an unknown reason Apple has deleted Easter Sunday from the iCal calendars of some users.

Easter Sunday falls on April 1 this year. As of the most recent Apple iOS version, many users are reporting that the holiday does not show on their calendar.

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Other users are reporting that they have Easter Sunday listed, but not Good Friday.

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The calendar defaults to US holidays and there’s an option to make it show alternate calendars, like Hebrew and Islamic holidays. However, as of the newest iOS version, a Christian calendar version doesn’t appear to exist.

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Apple has not commented on the issue. According to responses on Apple’s discussion threads, more than 1500 users are reporting the same issues.