#2day is commencement gotta lotta feels
Because typing characters isn’t always the fastest, especially on older phones, there’s some fun number slang based around homophones. (see also 666)
One that’s remained somewhat in circulation is 520, because wǔ'èr líng is close to wǒ ài nǐ 我爱你! Brands especially have capitalized on this to make another valentine’s day—but you can use it as an excuse to just do something sweet (o˘◡˘o)