The day's Yamagandam window, by weekday.
Yamagandam is a second inauspicious segment of the daylight hours, computed the same way as Rahu Kalam — sunrise to sunset split into eight parts, one assigned per weekday — and avoided for the same kinds of beginnings.
Yamagandam (also written Yamaganda) is one of the three inauspicious daily windows, alongside Rahu Kalam and Gulika Kalam. Like them it is avoided for auspicious beginnings.
The daylight span from sunrise to sunset is divided into eight equal parts, and one of those parts is assigned to it. Which part depends on the weekday, so the window moves through the day across the week.
Yes. The window is derived from local sunrise and sunset, so it shifts with both the date and the latitude/longitude of the place you enter.