Sharepoint Online Javascript get calendar events using rest

Ive tried to fetch calendar events using this:

_api/search/query?querytext='ContentClass:STS_ListItem_Events EventDate>10/10/2014 EndDate<1/1/2016'&selectproperties='Title,EventDate,EndDate,AllDayEvent'

which brings an error.

"We didn't understand your search terms. Make sure they're using proper syntax."

However, if i remove the enddate and eventdate code like this it works:

_api/search/query?querytext='ContentClass:STS_ListItem_Events'&selectproperties='Title,EventDate,EndDate,AllDayEvent' 

where is my syntax error