Work hours overlap calculator
Find common availability windows across weekly schedules and zones.
วิธีใช้ Work hours overlap calculator
Work hours overlap calculator finds the shared working window for 2 to 30 people in different time zones. Enter each person as name, IANA timezone, start time and end time, and pick a week starting date; for each of the seven days, it reports the overlap in UTC and its length in minutes when it meets your minimum, 30 minutes by default.
- Paste the source into the input editor, or load the built-in example.
- Set week starting date, minimum overlapping minutes.
- Run work hours overlap calculator, review the output, then use the available copy or download controls.
ความสามารถของเครื่องมือนี้
Applies each person’s daily schedule on seven consecutive local dates. Uses IANA timezone rules, supports overnight shifts and rejects nonexistent or ambiguous local times. Weekday-specific schedules are not included.
- Week starting date
- Set this value for your task.
- Minimum overlapping minutes
- Range: 1 to 1440
ข้อจำกัดและการประมวลผล
Printable output downloads as HTML and supports Print / Save as PDF. Date lists are capped at 366 candidate occurrences, participants at 64 for brackets and 50 for round robin, and worksheets at their visible limits. Source is processed locally.
ตัวอย่างข้อมูลนำเข้า
Alex,America/Bogota,09:00,17:00 Sam,Europe/London,09:00,17:00
คำถามที่พบบ่อย
How do I find overlapping work hours across time zones?
Enter one line per person, like Alex,America/Bogota,09:00,17:00, using IANA zone names. The calculator converts each schedule to UTC for every day of the selected week and keeps the window when everyone is working at once.
Why are the overlap times shown in UTC?
UTC is a neutral reference when participants follow different zones and daylight-saving rules. Convert the UTC from and UTC to values into each person's local time; days with clock changes are computed using each zone's actual rules.
Does the overlap calculator support night shifts?
Yes. If someone's end time is earlier than or equal to their start time, their shift is treated as ending the next day. The same daily schedule is applied to all seven dates; weekday-specific schedules are not supported.
Where is my input processed?
This operation processes its source in your browser. Copy and download are explicit actions; source input is not saved in an account or history.
What are the input limits?
Printable output downloads as HTML and supports Print / Save as PDF. Date lists are capped at 366 candidate occurrences, participants at 64 for brackets and 50 for round robin, and worksheets at their visible limits. Source is processed locally.