极昼

極晝
jízhòu

midnight sun

Wiktionary

Entry Composition

=1 极 jí
  1. extremely
  2. pole (geography, physics)
  3. utmost
  4. top
=1 极 jí
  1. (historical dictionaries only) wooden rack on donkey
  2. wooden rack on donkey
2 昼 zhòu daytime