https://webresources.gu.se/RSS_Services/Calendar_dynamic_RSS?categoryNames=&calendarIds=1764699888&fromSiteNodeId=499500&languageId=100000&startDateTime=2019-06-01&endDateTime=2019-06-30&endDateTime=2019-02-09&siteNodeId=499500&languageId=100000&categoryAttribute=eventTypes&categoryNames=Halvtidsseminarium The top 25 events