For location-based communication with mobile devices, a condition is received at a device associated with a caller. The condition has to be satisfied by a callee at a future time and at a location, the location being a place where different callees with different mobile devices are present at different times. An instruction is received at the device for making a telecommunication call to the location where the callee is present with a mobile device and satisfies the condition at the future time. A set of potential callees is identified. Each mobile device associated with each callee in set of potential callees is present at the location at the future time, and each potential callee in the set of potential callees satisfies the condition. The telecommunication call is initiated to mobile devices associated with a subset of potential callees, the subset of potential callees including the callee.