в + Accusative
minutes	в двђдцать (Acc.) минџт вторћго	at twenty minutes past one
hours	в чђс (Acc.)	at one o'clock
	в двђ (Acc.) часђ (Gen.)	at two o'clock
day names	в срљду	on Wednesday
'day'	в дљнь (Acc.) рождљния (Gen.)	on (one's) birthday ( Lit. 'day of birth')
в + Prepositional/Locative
month names	в январљ	in January
'month'	в ітом мљсяце	(in) this month
'year'	в прћшлом годџ (Locative)	last year
Instrumental (without preposition)
times of the day and year
	џтром/днём/вљчером/нћчью	in the morning/afternoon/evening/night
	веснћй/лљтом/ћсенью/зимћй	in the spring/summer/fall/winter
Genitive (without preposition)
dates	Контрћльная бџдет пїтого мђя.	The quiz will be on the fifth of May.
чљрез + Accusative
an hour, day, week, etc. later	чљрез чђс	an hour from now
	чљрез недљлю	a week from now
по + Dative
every morning, evening, night only	по утрђм	every morning
	по вечерђм	every evening
кђждый + Accusative
every morning, day, week, etc.	кђждое џтро	every morning
	кђждую недљлю	every week
на + Prepositional
this week, last week, next week	на ітой недљле	this week
	на бџдущей недљле	next week
	на прћшлой недљле	last week
на + Accusative
on the N th day, week, etc.	на трљтий дљнь	two days later
	на слљдующий дљнь	next day
	на трљтью нћчь	two nights later
	на слљдующий гћд	next year, the following year
	на трљтий гћд	two years later