I am Russian myself, if you have any questions I will be very happy to help you.
As for the flowers, you are right
Odd number of flowers are given to the dead people in Russia. That is why my husbands throws away one every time
There is Russian holiday, which is called Women's day, it is not only RUssian, but international, though it is not widely celebrated. It is celebrated on March, 8. It is similar to american MOther's day, but it is a holiday for all females from baby-girls to seniors. Men give their women flowers (tulips are traditional as they are one of the first spring flowers), and gifts. It is my favorite holiday!!!!!!
Another tradition is to celebrate NEW YEAR night with a big dinner and great party all night long. At home or out (clubs, restaurants, etc). It is FUN! This holiday is greater than Christmas.BTW, Russian Christmas is January, 7.
I can help you with food recipes if you need. Just ask!