It's a Beautiful Day is an American band formed in San Francisco, California, in 1967, featuring vocalist Pattie Santos along with violinist David LaFlamme and his wife, Linda LaFlamme, on keyboards.

David LaFlamme, who as a youth had once performed as a soloist with the Utah Symphony Orchestra, had previously been in the group Orkustra playing five-string violin. The other members of It's a Beautiful Day in its early years were Val Fuentes (drums), Mitchell Holman (bass) and Hal Wagenet (guitar). Although they were one of the notable San Francisco bands to emerge from 1967's Summer of Love, the band never achieved the success of contemporaries such as the Grateful Dead, Jefferson Airplane, and Santana, with whom they had connections. The band created a unique blend of rock, jazz, folk, classical, and world-beat styles.