123456789KeyworddaytimedaylightFrequency#3283Strokes9ReadingszhòuMnemonicWhen the sun is a foot 尺 above the horizon 旦Stroke orderComposed of尺ruler旦danUsed in vocabulary昼夜zhòuyèday and night; period of 24 hours; continuously, without stop白昼báizhòudaytime昼zhòudaytime不分昼夜bùfēnzhòuyèday and night; round-the-clock极昼jízhòupolar day昼伏夜出zhòufúyèchūnocturnal; to hide by day and come out at night昼夜节律zhòuyèjiélǜcircadian rhythm