日午 is read as にちご (nichigo) and means noon.
にちご
nichigo
うまのひ
day of the Horse
ひび
days (e.g. of one's youth)
ひなか
Japan and China
にほん
Japan
にほんじん
Japanese person
にほんご
Japanese (language)
にほんいち
Japan's best
ひ
(past) days
ひごろ
normally
にちじ
date and time
ひので
sunrise
ひにち
(number of) days