+Seasons
in autumn
in winter
in the summer
in the spring
+Time of the day
in the morning
in the afternoon
in the evening
in the night
+Month, year,
century
in February
in 1999
in the 20th century
+Days, date,
Specific Event
on Monday
on May 19th
on my birthday
at 11:30am
at night
at Christmas time
