This is our day guide for Monday May 18th 2026 which shows you at a glance what's happening on this day around the world. Using the calendar on this page, you can look at a day guide for any day. Why not look up your birthday to see which holidays you share it with?

Observances on May 18th 2026

International Day for Museums

International Day for Museums

Find out the dates, history and traditions of International Day for Museums

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World Therapeutic Horticulture Day

World Therapeutic Horticulture Day 🌱

Celebrate the healing touch of nature on World Therapeutic Horticulture Day and embrace the benefits of gardening for well-being.

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National Cheese Souffle Day

National Cheese Souffle Day

Find out the dates, history and traditions of National Cheese Souffle Day

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National HIV Vaccine Awareness Day

National HIV Vaccine Awareness Day

Find out the dates, history and traditions of National HIV Vaccine Awareness Day

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National No Dirty Dishes Day

National No Dirty Dishes Day

Find out the dates, history and traditions of National No Dirty Dishes Day

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National Visit Your Relatives Day

National Visit Your Relatives Day

Find out the dates, history and traditions of National Visit Your Relatives Day

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National Numeracy Day

National Numeracy Day

Nearly half the working-age population of the UK have the numeracy skills of a primary school child.

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