Six o'clock (can mean 6 a.m. or 6 p.m. depending on context).
私は毎朝六時に起きて散歩します。
I get up at six every morning and go for a walk.
会議は六時から始まるので、遅れないでください。
The meeting starts at six, so please don't be late.
夕食は大抵六時頃に食べる家庭が多い。
Many families usually have dinner around six o'clock.
In Buddhism, one of the six divisions of the day (a traditional temporal scheme: e.g., morning, midday, etc.).
古典的な僧の勤行では、六時の区切りに合わせて読経することがある。
In traditional monastic practice, sutra recitation may be done according to the six divisions of the day.