以下句子用英文怎么写

I have my hair cut every 3 months .
The last party that I held is in Mar 6th last year .
The party was held for my birthday .

1、我三个月理一次发。
i often cut my hair in three month long.

2、我上次举办的派对在去年的三月六日。
my last patty is at 6th March in last year.

3、也是为我生日举办的派对。
the patty is also for my birthday