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Convert your birthday to Gregorian (if you only know Hijri):
Use a calendar converter or look up your exact birth date in both calendars to know your fixed Gregorian date of birth.
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Find your next birthday:
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Take today’s date.
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Replace the year with the current year, but keep your birth month and day.
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Example: if your birthday is 15 October, then for 2025 it is 15-10-2025.
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Check if it has already passed:
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If today’s date is before 15 October 2025, then your next birthday is this year.
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If today’s date is after 15 October 2025, then your next birthday will be 15-10-2026.
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Count the days left:
To save time, you can also use online tools to do the math for you.