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d A symbol for day. day A unit of time defined as exactly 86,400 sseconds, and as exactly 1,400 minutes, and as exactly 24 hours. Symbol: d. hour A unit of time defined as exactly 3600 seconds, and as exactly 60 minutes. Symbol: h; hr. hr A symbol for hour. min A symbol for min. minute A unit of time defined as exactly 60 seconds. Symbol: min. mo A symbol for month. month A unit of time equivalent to 2.628x106 seconds. Symbol: mo. s A symbol for second. sec A symbol for second. second The SI standard unit of time. Symbol: s; sec. shake A unit of time defined as exactly 1x10-8 seconds. week A unit of time equivalent to 604800.0 seconds. Symbol: wk. wk A symbol for week. year A unit of time defined as exactly 3.1536x107 seconds. Symbol: yr. yr A symbol for year.

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