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In most countries Mother's Day is celebrated on the second Sunday in May, among them the USA, Canada, most European countries, Australia, New Zealand, India, China, Japan, the Philippines and South Africa.
Motherâs Day: Celebrations and Traditions. While versions of Motherâs Day are celebrated throughout the world, traditions vary depending on the country. In Thailand, for example, Motherâs Day is always celebrated in August on the birthday of the current queen, Sirikit.