Twosday is the name given to Tuesday, February 22, 2022, and an unofficial
one-time secular observance held on that day, characterized as a fad. The name is a
portmanteau of two and Tuesday, deriving from the fact that the digits of the date form a
numeral palindrome marked by exclusivity or prevalence of the digit 2—when written in different
numerical date formats, such as: 22/02/2022,[a]22/2/22 and 2/22/22.[b][c] It is also an
ambigram.[d] According to
University of Portland professor Aziz Inan, the palindrome is one of the "ubiquitous palindromes", as it retains its defining characteristics globally, despite the differences in national date formats. In countries that apply the
ISO 8601 international standard for the calendar, there is an additional congruence inasmuch as Tuesday is the second day of the week under this scheme.
The attraction to the date is due to
apophenia. Twosday was cited as an example of humans being conditioned under
societal institutions to notice only some while ignoring other coincidences that surround them. Attraction to
numerology was cited as a reason as well.
In 2016, the website 22-2-22.com was created to count down to the date. Snopes wrote about Twosday in 2018, in one of its articles debunking false rumors about special dates—the claim about Twosday was rated as "True", but the concept was criticized insofar "2/22/2022 certainly features a number of 2s, but isn’t it fudging things to use the 22nd day of a year that includes a number other than two?"
In Singapore, 500 couples were scheduled to be wedded, nine times more than the usual.
American food holiday "National Margarita Day" coincided with Twosday, and various thematic activities relating to Twosday took place, mostly in the form of sales promotions (such as 22%
discounts). Various businesses engaged in other Twosday-specific sales promotions.
The subsequent Twosday in the United States date notation (i.e. another 2/22/22 that falls on a Tuesday) is February 22, 2422. In a year that ends with 22 (which could be 2122, 2222,[e] etc.), that is the first subsequent occurrence of February 22 being on a Tuesday, per the
400-year Gregorian calendar cycle.
In relation to Twosday, Thursday, March 3, 2033 (3/3/33) was named "Thirdsday", a
portmanteau of thirds and Thursday. It is not palindromic in the eight-digit format.[f]
Another name used for this date is "Threesday".