夜更かし (yofukashi) means “staying up late”

More examples

明日の朝が早いので、今夜は夜更かしを控えます。asu no asa ga haya i no de kon ya wa yo fu ka shi o hika e ma su

Since I have to get up early tomorrow, I will avoid staying up late tonight.

It means staying awake into the night instead of going to sleep at the usual time.

徹夜tetsuya: Remaining awake all night, often until the next morning.

通常眠る時刻を過ぎても寝ずに起きていること。tsū jō nemu ru ji koku o su gi te mo ne zu ni o ki te i ru ko to

The native Japanese compound 夜更かし (yofukashi) combines 夜 (yo, "night") with 更かし (fukashi), the noun form of 更かす (fukasu, "to keep awake late").

The meaning of 夜更かし (yofukashi) is close to "burning the midnight oil," but the Japanese word is a general noun and does not require a work-related context.