1.
Saturday and Sunday, the weekend
An abbreviation for Saturday (土曜日) and Sunday (日曜日), used to refer to the weekend.
Usage
A very common abbreviation in everyday Japanese. Often seen on signs, schedules, and in conversation. Frequently combined with 祝日 (national holidays) as 土日祝 or 土日祝日.
Common collocations
Similar words
土日 specifically means Saturday and Sunday. 週末 (weekend) is slightly more general and can sometimes include Friday evening. 休日 (day off, holiday) refers to any non-working day.