Guides
Guides
UTC offsets are inputs, not permanent city facts
Daylight-saving rules can change a location's offset during the year.
GuidesConvert via UTC
Subtract the source offset to reach UTC, then add the destination offset.
GuidesWatch for date changes
A converted raw hour can fall below 0 or above 23.
GuidesUse overlap as a planning baseline
A simple work-window overlap model assumes equal workday lengths and aligned starts.