The Sunday before Easter, marking Jesus's triumphal entry into Jerusalem.
Astronomically anchored to Easter (the first Sunday after the first full moon following the spring equinox in the Western tradition). The date is the same globally each year, though Eastern Orthodox traditions use a different rule.
Palm Sunday begins Holy Week. It commemorates Jesus's entry into Jerusalem, where crowds laid palm fronds on his path. Many Christian traditions distribute palm leaves at services, often woven into crosses, to be kept through the year and burned the following Ash Wednesday.
Computed for India (Asia/Kolkata) using local sunrise, sunset and astronomical positions.