Pronunciation: /ʌnˈbɜrθ.deɪ/
noun a day that is not one's birthday; a day that is not one's actual date of birth
A1 An unbirthday is a day that is not your actual birthday.
A2 Alice in Wonderland celebrates her unbirthday with the Mad Hatter and the March Hare.
B1 The concept of an unbirthday party was popularized in Lewis Carroll's book.
B2 Some people like to celebrate their unbirthday as a way to have an extra special day each year.
C1 The idea of an unbirthday can be seen as a whimsical way to celebrate life outside of traditional milestones.
C2 The Mad Hatter's unbirthday party in Alice in Wonderland is a classic example of embracing the joy of everyday celebrations.
formal I hope you have a pleasant unbirthday celebration.
informal Let's have an unbirthday party just for fun!
slang Hey, let's hang out and pretend it's our unbirthday!
figurative Sometimes it's nice to treat every day as an unbirthday, a reason to celebrate just being alive.
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