Kalki Jayantī 2058

Kalki Jayantī commemorates the birth of Bhagavān Kalki, the tenth and final avatar of Viṣṇu prophesied to appear at the end of Kali Yuga, riding a white horse and wielding a blazing sword to end adharma and restore dharma. The observance falls on Ṣaṣṭhī, the sixth day of the bright fortnight (Śukla Pakṣa) of Śrāvaṇa.

Devotees observe the day with fasting, reading or reciting the Kalki Purāṇa, and worship of Viṣṇu in his Kalki form. Because the day is decided by a Sāyaṅkāla (dusk) prevalence rule rather than a fixed sunrise tithi, the exact date can shift by a day depending on the city; this page resolves that for your location automatically.