Bulk move calendar events from one Google Calendar to another Google Calendar using Google Apps Script with Google Calendar API

利用 Google Apps Script 及 Google Calendar API 編寫的小程式，可批次修改 (bulk edit) Google Calendar 的事件。

1. In your Google Drive, create a new Apps Script project.
2. Copy the codes in _moveTo.gs, calendarAPI.gs, and _config.gs from the repository to the Editor.
3. In the script editor, select Resources > Advanced Google services....
4. In the Advanced Google Service dialog that appears, click the on/off switch next to the Calendar API service to enable it.
5. Click OK to close the dialog.
6. Open the _config.gs file, declare your Calendar Ids to the Cal_Id object.

1. Change the enddate in line 4 of moveTo.gs.
2. By default, the startdate in line 5 is defined as 31 days before the enddate. Please change the code if you want to set a different period of date.
3. In line 12, the Move1To2() function moves the events from Calendar1 to Calendar2. Plesae create a custom function if you need to process multiple sets.
4. Replace the value for the kword variable (line 19) inside the Move1To2() function with the query keyword for the calendar events.
5. Run the doGet() function.
   Note: A dialog will pop up for authorization when you run the script for the first run.
6. Verify the update in your Google Calendar.