Day (day)
Definition: Day na time unit wey equal 24 hours, or 86,400 seconds.
History/origin: Day na one of the oldest natural time units, based on Earth rotation and the light-and-dark cycle.
Current use: Days dey important for calendars, deadlines, shipping estimates, habits, medicine schedules, and project planning.
Week (wk)
Definition: Week na seven-day calendar interval wey people dey use to group work, school, religious, and planning cycles.
History/origin: Seven-day cycles spread through ancient religious, astronomical, and civic traditions before e enter modern international calendars.
Current use: wk dey common for work schedules, class plans, sprint planning, pregnancy tracking, subscriptions, recurring chores, rent cycles, and short-term goals.