Color Legend:

Green (9 AM - 5 PM): Standard working hours
Yellow (6 AM - 9 AM, 5 PM - 10 PM): Flexible hours
Light Red (10 PM - 6 AM): Off hours

Overlap Indicators:

Dark Green: All working hours overlap
Light Green: Working + flexible hours overlap
Yellow: All flexible hours overlap

Red vertical lines indicate the current time in each timezone.