To stay up late (usually used in expressions like 'to stay up through the night'); commonly appears as '夜を更かす'.
昨夜は仕事が終わらず、夜を更かしてしまった。
I couldn't finish work last night and ended up staying up late.
試験前なのに彼はいつも更かしている。
Even though exams are coming, he always stays up late.
たまに更かすのはいいが、続くと体に悪い。
It's okay to stay up late occasionally, but it's bad for your health if it continues.