Ну есть такой вариант
Moscow Russia 27 April, 2016 Dear Julia,
Thank you for your letter. My congratulations to your grandmother on her birthday!
It is wonderful that your family is very friendly! As for me, we also try to keep family traditions. So we usually celebrate our birth- days. We always prepare something unusual and surprising for our parents' birthdays. For example, last year my brother and I made a fantastic cake for our mother's birthday.
She was very happy! Soon we'll celebrate our aunt's birthday and we've already begun to prepare for it. As it will be in May, we want to plant beautiful flowers in her garden. It'll be our surprise!
Write back soon!
With love,
Karina