(IN / AT / ON) summer
IN
(IN / AT / ON) the weekend
AT
(IN / AT / ON) 2017
IN
(IN / AT / ON) Tuesday
ON
(IN / AT / ON) 7 o'clock
AT
(IN / AT / ON) breakfast time
AT
(IN / AT / ON) night
AT
(IN / AT / ON) New Year
AT
(IN / AT / ON) the morning
IN
(IN / AT / ON) May 17th
ON
(IN / AT / ON) August
IN