The Russian calendar

1. On Russian calendars the days of the week are placed on the left side, not on the top row.
2. The Russian week begins on Monday. Look at the example:

   понедельник	1	8	15	22	29
   вторник	2	9	16	23	30
   среда	3	10	17	24	31
   четверг	4	11	18	25
   пятница	5	12	19	26
   суббота	6	13	20	27
   воскресенье	7	14	21	28

3. To answer the question когда? with days of the week, we use the preposition в and the day of the week in the accusative case:
   В среду мы были дома.
   On Wednesday we were at home.
   В четверг мы смотрели телевизор.
   On Thursday we watched television.
   
4. The names of the days of the week are not capitalized in Russian.