There are 2 bugs in month calendar.
When we move forward the task that was assigned for a date after 25th of October (and 25th of March), we get a task time changed incorrectly. The reason is daylight saving time changes that are not taken into account in the code.
Thanks so much,
Please try to use the updated js file from the next thread
dhtmlx.com/docs/products/kb/inde … xScheduler