• 曜日ようび — day of the week
• 月曜日げつようび — Monday
• 火曜日かようび — Tuesday
• 金曜日きんようび — Friday
• 照曜しょうよう — shining sun (literary)

曜 is a phono-semantic compound made from 日 (sun) and a phonetic component 耀 (shine). It originally expressed the idea of shining light. Over time, it came to represent the days of the week, each associated with celestial elements like the sun, moon, and planets.

今日きょうは 金曜日きんようびです。
Today is Friday.

曜日ようびを確認かくにんしてください。
Please check the day of the week.