We could find no reference to a National Brother's Week, however there is a National Brother's Day, which is observed each year on May 24.

The first National Brother was held on May 24, 2005 when 3 brothers decided they wanted to do something special all together. That year the 2, 5, and 7 year old brothers spent the day at Build a Bear in Nevada, and in 2008 they went to the Valley of Fire, and watched the fountains at the Bellagio in Las Vegas.

National Brother Day seeks to celebrate brothers, the male sibling and their contributions to each and every one of their families. It seeks to celebrate the bond between brothers and its significance.

National Brother Day is an unofficial national holiday. It is not to be confused with National Sibling Day, which is celebrated in April.

Struggling to find the right gift for your brother? This list has something for every budget and personality shared by Heavy.com.

Tuesday, February 21 2017
Source: http://www.wincalendar.com/Brothers-Day