У вашего броузера проблема в совместимости с HTML5
This video is shows how to customize Settings for the Calendar app on your iPhone or iPad. In this tutorial we cover Time Zone, Alternate Calendars, Week Numbers, Invitee Decline, Sync, Default Alert Times, Start Week On and Default Calendar Settings.
Watch our other Calendar app videos:
Overview, New Event & Search - https://youtu.be/3nCNdzTu1k8
Settings - https://youtu.be/pJZRSrd8zN8
Multiple Calendars & Invitations - https://youtu.be/ds_OdI4X_Rg
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