This plugin will allow you to set the start date, end time, and number of weeks (along with a few other settings) for a countdown timer. Good to use if you need a weekly recurring timer that ends at a certain time, but picks up the next day.

THINGS TO REMEMBER:

// Madatory settings:
	startDate: '04/25/2018',              // Set today's date (!important - must set otherwise countdown will not end)
	weeksToRecur: 1                       // Set number of weeks countdown should recur, defaults to 4 weeks

// Optional settings:
	debug: false,                         // This stops the time in order to update the css
	textColor: 'green',                   // Color of timer text, defaults to green
	endDay: 'Sunday',                     // End day for timer, defaults to "Sunday"
	endTime: '11:59:00 am',               // End time for timer, defaults to "11:59:59 pm", Format like '05:05:20 pm'
	deadlineText: "Sorry, time's up!",    // Text to show user after timer ends

Check out the Countdown Recur Timer in action. Countdown Recur Timer repository.