One also has to perform his sandhyadi-vandana – that is, one has to
chant his Gayatri mantra three times daily – morning, noon and
evening.
One may chant Gayatri at the three sandhyas, sunrise, noon and
sunset. Also it is acceptable to chant Gayatri in the morning after
applying tilaka. See conversation, January 18, 1976, Mayapur
