Google Calendar

Google日曆「預約時段」功能可以讓你指派一時間間隔給你想約見的人,只要對方在你的時間間隔內選擇一時段便可以了!

The "appointment slots" feature in Google Calendar lets you nominate specific times in your schedule that other people can book.

https://usingtechnologybetter.com/schedule-time-with-your-students-using-google-calendar-appointment-slots/

(Credit: GEG HK & Macao SAR)