Dear Friends i had made a simple project that might useful for you

Follow the procedure in readme to understand more clearly

Step 1 - import the respective module
Step 2 - ask the input
Step 3 - spilt the input to list mode by ":"
Step 4 - separate the input list by index 0 and 1
Step 5 - now make those list correct for datetime
Step 6 - make today's date
Step 7 - subract the deadline date and today's date
Step 8 - print it out with f string