Huitzilopochtli's principal festival was the Toxcatl, celebrated immediately after the Toxcatl festival of Tezcatlipoca, to which it bore a strong resemblance. Festivals of the god were held in May and December, at the latter of which an image of him, moulded in dough kneaded with the blood of sacrificed children, was pierced by the presiding priest with an arrow--an act significant of the death of Huitzilopochtli until his resurrection in the next year.
Strangely enough, when the absolute supremacy of Tezcatlipoca is remembered, the high-priest of Huitzilopochtli, the Mexicatl Teohuatzin, was considered to be the religious head of the Mexican priesthood. The priests of Huitzilopochtli held office by right of descent, and their primate exacted absolute obedience from the priesthoods of all the other deities, being regarded as next to the monarch himself in power and dominion.
Tlaloc was the god of rain and moisture. In a country such as Mexico, where the success or failure of the crops depends entirely upon the plentiful nature or otherwise of the rainfall, he was, it will be readily granted, a deity of high importance. It was believed that he made his home in the mountains which surround the valley of Mexico, as these were the source of the local rainfall, and his popularity is vouched for by the fact that sculptured representations of him occur more often than those of any other of the Mexican deities. He is generally represented in a semi-recumbent attitude, with the upper part of the body raised upon the elbows, and the knees half drawn up, probably to represent the mountainous character of the country whence comes the rain. He was espoused to Chalchihuitlicue (Emerald Lady), who bore him a numerous progeny, the Tlalocs (Clouds). Many of the figures which represented him were carved from the green stone called chalchiuitl (jadeite), to typify the colour of water, and in some of these he was shown holding a serpent of gold to typify the lightning, for water-gods are often closely identified with the thunder, which hangs over the hills and accompanies heavy rains. Tlaloc, like his prototype, the Kiche god Hurakan, manifested himself in three forms, as the lightning-flash, the thunderbolt, and the thunder. Although his image faced the east, where he was supposed to have originated, he was worshipped as inhabiting the four cardinal points and every mountain-top. The colours of the four points of the compass, yellow, green, red, and blue, whence came the rain-bearing winds, entered into the composition of his costume, which was further crossed with streaks of silver, typifying the mountain torrents. A vase containing every description of grain was usually placed before his idol, an offering of the growth which it was hoped he would fructify. He dwelt in a many-watered paradise called Tlalocan (The Country of Tlaloc), a place of plenty and fruitfulness, where those who had been drowned or struck by lightning or had died from dropsical diseases enjoyed eternal bliss. Those of the common people who did not die such deaths went to the dark abode of Mictlan, the all-devouring and gloomy Lord of Death.