Week 4 of 2025

January 20, 2025 (Monday) to January 26, 2025 (Sunday)

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ISO Week Number
Week 4
2025 · Week 4 of 52 total weeks

What dates are in Week 4 of 2025?

Week 4 of 2025 runs from January 20, 2025 (Monday) to January 26, 2025 (Sunday). This is the 4th week of the year according to the ISO 8601 standard, in which weeks start on Monday.

Mon
Jan 20
Day 20
Tue
Jan 21
Day 21
Wed
Jan 22
Day 22
Thu
Jan 23
Day 23
Fri
Jan 24
Day 24
Sat
Jan 25
Day 25
Sun
Jan 26
Day 26
Starts January 20, 2025 Monday · Day 20
Ends January 26, 2025 Sunday · Day 26
Duration 7 days 2025 · 52-week year

📅 Nearby weeks in 2025

Week 2Week 3Week 4Week 5Week 6

📋 All 52 weeks in 2025

12345·678910·1112131415·1617181920·2122232425·2627282930·3132333435·3637383940·4142434445·4647484950·5152

📆 Week 4 in other years

Week 4 · 2024Week 4 · 2026

🔧 Related tools

Week Number Calculator Date to Week 2025 Full Calendar

❓ Related questions about Week 4 of 2025

What day of the week is Jan 20?

Jan 20 is a Monday. It is the first day of Week 4 of 2025.

What day of the week is Jan 26?

Jan 26 is a Sunday. It is the last day of Week 4 of 2025.

What is the ISO week number for Jan 20?

Jan 20 is in Week 4 of 2025 according to ISO 8601.

What is the ISO week number for Jan 26?

Jan 26 is in Week 4 of 2025 according to ISO 8601.

❓ Frequently asked questions about Week 4 of 2025

What dates are in Week 4 of 2025?

Week 4 of 2025 runs from January 20, 2025 to January 26, 2025.

Which day of the year does Week 4 start on?

Week 4 of 2025 starts on January 20, 2025, the 20th day of 2025.

Does Week 4 of 2025 fall entirely within 2025?

Yes, all 7 days of Week 4 of 2025 fall within 2025.

How many weeks are in 2025?

2025 has 52 weeks according to ISO 8601.