My mother's birthday.
So I buy her birthday present.=So I bought her a birthday present.
How?
When I go to my grandmother's house,
she give me some money.=When I went to my grandmother's house,
she gave me some money.
So I save money like that.
So last birthday,
I had 45millon moneys.=I had 45 million moneys.
So I bought two rings.
Ofcaurse she picked it.=Of course, she picked it.
So I was very happy.
I want buy a beautiful jwely again.=I want to buy a beautiful jewelry again.

***TAKE NOTE: Birthday is not a holiday. It is an important day because it is the day you were born. While holiday is a period in which a break is taken from work or studies for rest, travel, or recreation 

-a day on which work is suspended by law orcustom, such as a religious festival, bank holiday,etc