As admin, enable "Mobile services": Site administration ► Mobile app ► Mobile settings Go to Administration > Location > Location settings and set the "Force timezone" option to "Users can choose their time zone" Create a Token in the mobile app service for any user in the site (not an admin account) Click on Site administration ► Plugins ► Web services ► Manage tokens Access to the Moodle site using the user account from previous step Go to your user profile and click the "Edit profile" link within the "User details section" Change the indicated Timezone to "Europe/Madrid" and "Save changes" Go to your calendar (from the site home or your dashboard not from inside a course) and create a personal/User event for yesterday at 10pm Open the console an execute this new curl request, replacing wstoken with the token you just created and the site url with yours. Change the year, month and day values so they match to the same day you created the calendar event in the previous step curl 'http://localhost/m/stable_master/webservice/rest/server.php?moodlewsrestformat=json' --data 'year=2020&month=9&day=16&wsfunction=core_calendar_get_calendar_day_view&wstoken=YOUR_WS_TOKEN' --compressed | python -m "json.tool" Confirm that: In the curl request response, you see among data a first-level element called "events" that contains information from the event you created a few steps ago Now, add the following parameter to the previous currl request: moodlewssettingtimezone=Australia/Perth Execute the curl request and confirm that: In the curl request response, you see among data a first-level element called "events" that is empty Now, in the previous CURL request, change the day (add one day, so if it was the 16 use 17) Execute the curl request and confirm that: In the curl request response, you see among data a first-level element called "events" that contains information from the event you created a few steps ago As admin, access to your Moodle site again Go to Administration > Location > Location settings and set the "Force timezone" option to "Europe/Madrid" Execute the last curl request (previous step) and confirm that: In the curl request response, you see among data a first-level element called "events" that is empty