The Simbang Gabi' originated in the early days of Spanish rule over the Philippines as a practical compromise for farmers, who began work before sunrise to avoid the noonday heat out in the fields. It began in 1669. Priests began to say Mass in the early mornings instead of the evening novenas more common in the rest of the Hispanic world. This cherished Christmas custom eventually became a distinct feature of Philippine culture and became a symbol of sharing.
Filipinos still celebrate this Mass with great solemnity where the priest wears white and the 'Gloria' is sung.