WREN & MARTIN's English grammar-Quick Reference — Prepositions of Time and the Relations They Express:

 

Quick Reference — Prepositions of Time and the Relations They Express:

Preposition	Time Relation Expressed	Example
at	Precise clock times; fixed points; specific moments	at 9 a.m. / at noon / at midnight / at dawn
on	Specific days; dates; named occasions	on Monday / on 5th May / on Christmas Day
in	Months; years; decades; centuries; seasons; longer periods	in July / in 2020 / in winter / in the 19th century
for	Duration; length of time	for two hours / for three days / for a week
since	Specific starting point continuing to present	since Monday / since 2015 / since childhood
during	At some point within a period or event	during the meeting / during summer
by	Not later than; deadline; at or before	by Friday / by 5 p.m. / by the end of the month
until/till	Continuously up to a specific end point	until midnight / till the end of the year
before	Earlier than; prior to a point in time	before noon / before the exam
after	Later than; subsequent to a point in time	after dinner / after the match
from	Starting point of a time period	from Monday / from 9 a.m.
to/till	End point of a time period (used with from)	from Monday to Friday / from 9 to 5
past	Beyond a specific time; after a point is exceeded	past midnight / past noon / past bedtime
within	Inside a time limit; before the end of a period	within a week / within three days
between	In the time separating two specific points	between 9 and 5 / between Monday and Friday
throughout	During the whole of a period without interruption	throughout the year / throughout the night
about/around	Approximately at a time; roughly	about 3 o'clock / around midnight
over	During the course of a period	over the years / over the weekend
up to	As far as; not exceeding a time point	up to now / up to this point
upon	Immediately after; as soon as	upon arrival / upon completion
pending	While awaiting; until something happens	pending the result / pending approval