週 week

That hippy hasn't worn SHOES all week!!!

Each week the Earth moves around the circumference of the sun!!

last week ★★★★★
先 (earlier/ the tip) + 週 (week) = 先週 (last week)

this week ★★★★★
今 (now) + 週 (week) = 今週 (this week)

the weekend ★★★★☆
週 (week) + 末 (the tip) = 週末 (the weekend)

one week's time. ★★★★☆
一 (one) + 週 (week) + 間 (a period of time) = 一週間 (one week's time. )