Shenzhen
Sat, Jul 4, 05:30-06:30
New York
Fri, Jul 3, 17:30-18:30
Business Hours Overlap Calculator
Measure shared working hours between two cities and see a clear overlap score.
Quick Answer
Do these two cities have overlapping business hours?
Select both cities to measure shared 09:00-18:00 work-hour availability and receive a score from 0 to 100.
Overlap score
0/100
Shenzhen hours
09:00-18:00
New York hours
09:00-18:00
Business Hours Overlap
Three closest meeting options
No strict 09:00-18:00 overlap was found. The options below minimize out-of-hours impact; urgent mode may reveal a wider shared window.
Shenzhen
Sat, Jul 4, 06:30-07:30
New York
Fri, Jul 3, 18:30-19:30
Shenzhen
Sat, Jul 4, 07:30-08:30
New York
Fri, Jul 3, 19:30-20:30
How the overlap score works
The calculator treats 09:00 through 18:00 as the standard local workday in both selected cities. It builds the selected day from the From City in 30-minute increments, converts every increment into the To City timezone, and keeps only the points that fall inside both workdays. Because a nine-hour day contains 18 half-hour slots, the overlap score is the shared slot count divided by 18 and rounded to a whole percentage.
The score describes shared availability, not meeting quality. A score of 100 means the two clocks align for the entire standard workday. A score near 50 represents roughly half a workday of overlap. A zero score means there is no strict 09:00-18:00 match, but the tool still ranks the least disruptive alternatives by measuring how far each candidate sits outside normal hours.
Each displayed recommendation is a complete one-hour window. The calculation requires two consecutive matching 30-minute slots, so a single boundary point at 17:30 is not presented as though a full meeting fits. Enabling urgent mode widens the recommendation range to 07:00-22:00 in both cities. It does not inflate the overlap score, which always remains tied to standard business hours.
What common city pairs usually look like
These examples explain the shape of typical results. Select the exact meeting date above for the authoritative window because daylight saving changes can move an overlap by one hour.
New York and London
These cities normally retain a useful morning-to-afternoon overlap: New York morning corresponds to London afternoon. During the short weeks when US and UK daylight saving transitions do not align, the window shifts by an hour.
Tokyo and Singapore
The cities are usually separated by only one hour and neither uses a seasonal clock change. Most of both workdays overlap, so the score is high and the planner can offer early, middle, and late one-hour choices.
Shenzhen and New York
The large offset usually produces little or no strict workday overlap. A practical call often places Shenzhen near the evening edge and New York in the morning, which is why urgent or flexible scheduling may be necessary.
Frequently asked questions
How is the business hours overlap score calculated?
The score measures shared half-hour slots within 09:00-18:00 local time in both selected cities.
What is a good overlap score?
A higher score means more shared workday availability. Even a low score can still provide a practical edge-of-day meeting window.
Can I widen the acceptable work hours?
Yes. Enable urgent meeting mode to compare a broader 07:00-22:00 availability range.
Why is the overlap score based on 18 slots?
A 09:00-18:00 workday contains eighteen 30-minute slots. The tool divides the number of slots that are inside both cities' workdays by 18 and converts the result to a score out of 100.
Does urgent mode change the business hours overlap score?
No. The score always measures strict 09:00-18:00 overlap. Urgent mode only widens the hours used to find suggested meeting windows to 07:00-22:00.
Why can the overlap change on another date?
The selected date controls each city's IANA timezone offset. If one city enters or leaves daylight saving time before the other, their shared work-hour window can temporarily shift.
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