Create a Gmap with Views that connects locations of different nodes
This answer is for D7, you'll need the folowing modules: entityreference to relate both contentypes,
 geolocation_views only D7, it displays several nodes in a single map, geolocation, and simple_gmap, this one is for for users to enter city name in a text field, handy tutorials: https://www.youtube.com/watch?v=hdzembWMgPc and https://www.youtube.com/watch?v=Pc0xPiRBb54 and https://www.youtube.com/watch?v=FVvKJlq4Wo8, you will end with something like this, each mark in map links to your day-node, enjoy.