php/html display automatic week counter starting from a specific data

Question

Is there any coding (php / HTML or JS script) to display a week counter and start this counter from a specific date say i wanted to start this counter on Monday 25th March 2019 (and just display "Week 1"), then the number increases every week or 7 days (so on Monday 1st April 2019 it would change to "Week 2") until it gets to 52 weeks? Any help would be grateful!!!! thanks!

Answer 1

This can be done with plain JavaScript using the Date object.

First initialize a new Date from which you want to start counting

var startDate=new Date(2019,2,10); // will set the date to the 10th of March

Second get the actual time and date

var today=new Date();

Now simply get the difference between this two dates like this:

var difference=today-startDate;

This will return the difference in milliseconds.

To get the difference in days proceed like this

var days = difference / 1000 / 60 / 60 / 24;

Based on this you can get the number of weeks that passed by

var weeks = parseInt(days / 7);

Here's a working example:

 var startDate = new Date(2019, 2, 10); var today = new Date(); document.getElementById("stDate").innerHTML = "target: <b>" + startDate.toDateString() + "</b>"; document.getElementById("cDate").innerHTML = "today: <b>" + today.toDateString() + "</b>"; var difference = today - startDate; var days = difference / 1000 / 60 / 60 / 24; var weeks = parseInt(days / 7); var messaged = ""; if (weeks < 1) { message = "no weeks have passed"; } else { message = "weeks passed: <b>" + weeks + "</b>"; } document.getElementById("result").innerHTML = message;

 <div id="stDate"></div><br> <div id="cDate"></div><br> <div id="result"></div><br>