In order to solve this problem, we need to consider what preparations you need to make as a bridesmaid before the wedding, and then calculate how many days you need to arrive in advance.

Suppose the wedding is on 2 1 and 22/,and these two days are usually weekends with guests coming.

Some of the main preparations for bridesmaids are:

1. Attend the bride's prenuptial meeting and discuss the details of the wedding.

2. Try on wedding dresses and bridesmaid dresses with the bride.

3. Help the bride complete the beauty and fitness plan before the wedding.

4. Help the bride collect and arrange wedding supplies, such as bouquets, shoes, rings, etc.

5. Help decorate the wedding scene.

Considering these preparations, you should arrive at the bride's house at least one week before the wedding to help her finish these tasks. Suppose your friend's wedding is on 2 1 and 22/,then you should arrive at her home before 14.

Therefore, you need to arrive at your friend's house before 14 as her maid of honor.