Follow this to convert the xlsm files to bss/dbss.
https://forum.ragezone.com/f1001/update-dbss-for-corsair-the-1207381/
You will need to edit the sheet EventManage in DataSheet_Event.xlsm found in ServerDir\GameCommonDataUnpack\DataSheet\localdatasheet\
Im not sure about the regional sheets, no idea if the server calls for them or not.
Basically to make an event active, you need to change the expired date to a non expired date
For example, for the event "Halloween Event" which has a condition of "checkPeriodByGmt(0, 2019/10/16-06:00, 2019/11/06-05:00)" you would want to change it to domething like "checkPeriodByGmt(0, 2022/10/16-06:00, 2022/11/06-05:00)"