Day By Day is a lifestyle brand for the everyday jiu jitsu practitioner. Built on consistency and resilience, our motto—The Path to Black Belt—symbolizes the ongoing pursuit of progress on and off the mats. Every piece we create is a reminder to give your best daily. 

Founded in 2013, Day By Day was created by two brown belt brothers, AJ and Tim, living in Hawai‘i and San Diego. What started as a shared vision became a global brand—one that connects practitioners who live the balance, dedication, and grind of the jiu jitsu lifestyle.

With 30 years of combined experience training in the gi, we used our firsthand knowledge to create a premium gi featuring sleek ambigram graphics—launching the foundation of what Day By Day is today.

This is your journey. The Path to Black Belt.  

AJ Mendoza

Academy: Mano Jiu Jitsu 

Location: Kaneohe, Hawaii 

Rank: Black belt since 2016

Tim Mendoza

Academy: Gracie Humaita South Bay

Location: San Diego, California

Rank: Black belt, three degrees