how can i create a flight plan with multi legs and landings and stop for night and next day resume flight to next stop.
Only way I know of at this time is to create and save separate flight plans for each leg using the World Map or SimBrief. Then after landing on your first route, once stopped with the aircraft back to cold & dark, hit ESC then SPACE to bring up the Load/Save dialogue to save a .FLT file for your aircraft at that specific location and configuration. When you want to continue, load that .FLT file from the World Map, then using ESC then SPACE, load the flight plan for the next route.
I understand the .FLT files are still not 100%, but this is certainly worth a try to see if it solves your current problem.