Tomorrow is the Summer Solstice in the northern hemisphere and the Winter Solstice in the southern, so it is either the longest day of the year or the shortest. If you wish to celebrate this fact then these Google Maps mash-ups could prove useful in working out when the sun rises and when the sun sets tomorrow.
The Sunrise and Sunset Tracker indicates where the sun is currently rising and setting by drawing a polyline on a Google Map .
EarthTools lets you check the time of the sunset and sunrise anywhere in the world by setting your location on a Google Map.
The Daylight Map is a Google Map that shows where it is currently daytime and where it is night-time in the world. Areas where it is currently night are shaded out on the map. The night-time areas also show the effects of light pollution from electric lights. Daylight Map also has a Cloud Cover map showing current cloud cover around the world.
If you want somewhere special to experience the sun rise tomorrow then you could do worse than visit one of the places in the following maps: