burn the midnight oil

Etymology
Originally referring to the act of burning oil in lamps for light and safety. The noun is attested from mid c. 17

Verb

 * 1)  To work studiously, especially late into the night.

Translations

 * Arabic: أشعل فانوس الليل
 * Catalan: cremar-se les celles
 * Chinese:
 * Mandarin: ("to drive the night car"), ,
 * Czech: pracovat dlouho do noci,, pracovat dnem i nocí
 * Dutch: tot laat in de nacht werken, het nachtje doordoen
 * Finnish: valvoa yötä myöten
 * French: travailler tard le soir,
 * German: bis spät in die Nacht arbeiten, die Nacht zum Tage machen
 * Hebrew:
 * Hungarian: késő éjszakáig tanul, éjjel-nappal tanul,
 * Italian: fare le ore piccole, passare la notte in bianco
 * Japanese:
 * Latin: lūcūbrō
 * Latvian: strādāt pa naktīm
 * Polish: pracować po nocach, zarywać nocki
 * Portuguese: passar a noite em claro, virar a noite, fazer uma direta
 * Russian:, (e.g. "до по́здней но́чи")
 * Slovak: pracovať dlho do noci, pracovať vo dne v noci
 * Spanish: hacer días y noches,
 * Swedish:, låta flitens lampa lysa