Ultimo icalendar

If you want to view Ultimo (DCC) lab booking in your own calendar software (for instance google calendar). Use one the following urls. Replace U123456 with your own u-number. If you want to see just one lab, use one of the bottom two urls and replace the lab number with the one you want to see.

Google Calendar

To add the Ultimo calendar to Google Calendar:

Go to Google Calendar on your computer (not the app).
Click the down triangle icon ( ▼ ) to the right of Other calendars.
Choose Add by URL
Copy the desired URL above and paste it in the dialog.
Click Add Calendar

The calendar data will appear shortly. It will be updated about daily. Optionally you can give it a more concise name.

Apple Calendar (desktop)

To add the Ultimo calendar to Apple Calendar:

Open Apple Calendar
Click File -> New Calendar Subscription ...'
Copy the desired URL above and paste it in the dialog.
Click Subscribe

Android Calendar

Follow the steps above for Google Calendar.
Open the Android Calendar App
Click vertical ellipsis ( ⋮ ) → refresh
Click hamburger icon ( ≡ ) → settings
( click show more )
Click the desired calendar's name (starting with https://www.socsci.ru.nl/labbooking/ics if you did not rename it)

Gnome Calendar

Start gnome-calendar
Click the calendar icon ( 📅 )
Click Calendar Setting
Click Add ▼ → From Web...'
Copy the desired URL above and paste it in the dialog
Click Add

KDE Calendar (Akonadi)

Use the google sync

Korganizer -> right click calendar area -> Add Calendar... -> ICal Calendar File

Should work in KDE version 5.3.1 but gives error: Could not load file 'https://www.socsci.ru.nl/labbooking/ics/room/B.00.56/ultimo.ics'. Loading a downloaded version does work.

Microsoft Outlook Web App (OWA)

go to http://mail.ru.nl
login
click calendar (bottom left)
click share -> add calendar