OPPO mobile phone calendar, how to resume the course?

According to your description, it is found that you may have deleted all the schedules in your calendar before.

1. If this is the case, it is recommended to go to the cloud for backup to see if there are any schedule records to keep.

2. If not, it is generally difficult to recover.

3. In addition, you can try to add a schedule to your cloud notes, which can add calendars and lunar calendar reminders.

4. Even if the schedule added in the cloud note is deleted, the deleted record will be saved in the timeline, so it is easier to find and recover.