Sunrise, sunset and day length come from the astronomy engine shared across our apps, checked against the US Naval Observatory to within a minute. Times are shown in the local time of the place you choose, polar day and night included.

Savings take your annual usage into account, so any solar you can't use yourself is counted as exported. Choose °F for temperatures or Imperial for carbon figures in pounds.

Use My Location shows its progress, place searches tell you when nothing is found, and coordinates can be typed for anywhere in the world, south and west included.