Some flag facts about the flag of New Mexico:

Flag depicts a red sun symbol of the Zia tribe
The colors or red and yellow honor the flag of the Aragon realm, brought by the conquistadors
The Zia sun symbol has a sacred meaning for the Zia, with the sacred number of 4 which symbolizes the circle of life
The circle of life consists of the 4 directions, the 4 times of day, the 4 stages of life, and the 4 seasons
The flag was designed by Dr. Harry P. Mera who won a 1920 contest to design a new state flag for New Mexico
Flag was officially adopted since 1925
Ranked 1st in design quality out of 72 North American flag in a 2001 NAVA survey