File to parse time string error

There is no month 0, it has to start with 1 (=January).

If you want to see where this error is comming from, you can enable a trace: Admin > App configuration > Security: at the very end you’ll find: Should exceptions contain a trace, including function arguments

Ralf

Try the following SQL queries:

SELECT * FROM egw_cal_dates WHERE cal_start=20642400 OR cal_end=20642400;
SELECT * FROM egw_cal_user WHERE cal_recur_date=20642400;
SELECT * FROM egw_cal WHERE cal_created=20642400 OR cal_modified=20642400 OR cal_deleted=20642400 OR  cal_range_start=20642400 OR cal_range_end=20642400;