Add a date to a works tracker , which up dates my yearly planner calender.

Hello everyone.
uk, leicester boy here,
i have a works tracker that has a column with dates in entered like - 17 AUG.
i have a planner calender which is just cells with the months going from jan to dec.
in any date i place a letter x.
i want to just place a date in my first sheet in my cell for that job-ie
cell a -bristol cell b -the date i go on site.
this will then put x on my planner, and if i change my cell b to another date then this will automatically update my second sheet(calender).
can this be done anyone..