How to create array of timers that update each tab

Over the last couple of days I have been trying to figure out how I can update a tableViewCell from TableView controller and it's giving me hard time. Here is where I have reached thus far:

Creating a timer

I set the time for the reminder in editVC(which you accessed by tapping on the tableViewCell). There you can set the time and the reminder is made. Every task has sSelectedDate which is the date set by the user.

This is what I think I should do next: Send this sSelectedDate to the firstViewController(where the tableView resides) and use this date to create a timer in the firstVC.

Question: What is the correct way of sending the particular date from the task to firstVC?

timesUpTimer = Timer(fireAt: selectedDate, interval: 0, target: self, selector: #selector(updateTimeLabel), userInfo: ["taskID": EditNotes], repeats: false)

UserInfo Dilemma

The "taskID" I am sending can be a uniqueTaskID I can generate with each task when a reminder is created. EditNotes is the class of NSManagedObject for CoreData.

Question: What's the correct way of sending the uniqueTaskID to the firstViewController?

Selector Method

@objc func updateTimeLabel(_ timer: Timer)
{

    let userInfo = timer.userInfo as Dictionary<String, AnyObject>
    var task = userinfo["taskID"] as EditNotes
    task.belliconcolor = .white 
    // do stuff with task object

}

Since I am changing the coreData here I hope FetchedResultsController method is triggered and the tableView is updated.

This is the method invoked when a timer is up.

Question: Should I only rely on FRC or should I actually update the corresponding row in tableview? If yes then how?

Should I create Array for timers

This timer I create in the firstVC is for just one task? Do I have to create an array of timers and save it in coreData also?

Question: How to do it?

TLDR: How to create timers/array of timers for every element/task of the tableview that when invoked updates the corresponding row in the tableview?