وَٱلْقَمَرَ قَدَّرْنَـٰهُ مَنَازِلَ حَتَّىٰ عَادَ كَٱلْعُرْجُونِ ٱلْقَدِيمِ ٣٩
And the moon - We have determined for it phases, until it returns [appearing] like the old date stalk.
Your location stays on this device and is only sent, rounded to about 1 km, to fetch the times.