Where were they sitting during the party? They were sitting on the ground around the food.
What were they wearing during the party? They were wearing long garlands of paper flowers.
What music were they listening to? They were listening to Hawaiian music.
What dances were they performing during the party? They were performing a hula (Hawaiian dance), a dance with bows and arrows.
What dish were they making during the party? They were making Indian tacos.
Who was cooking the main dish? My friend’s mother was cooking it.
in 1991
on Friday
at 4 o'clock
on/at Christmas*
at noon
in winter
at 11 o'clock
in the morning
in August
* "At Christmas" we say when it's a longer time until Christmas. Like, "I'll see you at Christmas." (right now it is only October or something) Also, it could mean the days before and after Christmas
"On Christmas _Day_" we say to talk specifically about the 25th of December .