4-day weekend; four-day holiday
Refers to a stretch of four consecutive days off, often from work or school, typically including a weekend and adjacent holidays.
This weekend is a four-day weekend, so I plan to go on a trip.
With holidays overlapping, next month has two four-day weekends.
Standard kanji spelling.
Arabic numeral spelling is common in casual writing and headlines.
Compound of 四 (four) + 連休 (consecutive holidays).