How to calculate the date three months prior using JavaScript ?
Given a Date and the task is to get the date of three month prior using javascript.
Approach:
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- First select the date object.
- Then use the getMonth() method to get the months.
- Then subtract three months from the getMonth() method and return the date.
Example 1: This example uses getMonth() and setMonth() method to get and set the month date.
<!DOCTYPE HTML> <html> <head> <title> How to calculate the date three months prior to today </title> </head> <body style = "text-align:center;"> <h1 style = "color:green;" > GeeksForGeeks </h1> <p id = "GFG_UP" style = "font-size: 19px; font-weight: bold;"> </p> <button onClick = "GFG_Fun()"> click here </button> <p id = "GFG_DOWN" style = "color: green; font-size: 24px; font-weight: bold;"> </p> <script> var up = document.getElementById('GFG_UP'); var down = document.getElementById('GFG_DOWN'); var d = new Date(); up.innerHTML = "Today's Date= "+ d.toLocaleDateString(); function GFG_Fun() { d.setMonth(d.getMonth() - 3); down.innerHTML = "Before 3 Months, Date is " + d.toLocaleDateString(); } </script> </body> </html> |
Output:
- Before clicking on the button:
- After clicking on the button:
Example 2: This example uses getMonth() and setMonth() method to get and set the month date as provided.
<!DOCTYPE HTML> <html> <head> <title> How to calculate the date three months prior to today </title> </head> <body style = "text-align:center;"> <h1 style = "color:green;" > GeeksForGeeks </h1> <p id = "GFG_UP" style = "font-size: 19px; font-weight: bold;"> </p> <button onClick = "GFG_Fun()"> click here </button> <p id = "GFG_DOWN" style = "color: green; font-size: 24px; font-weight: bold;"> </p> <script> var up = document.getElementById('GFG_UP'); var down = document.getElementById('GFG_DOWN'); var d = new Date("2010/12/02"); up.innerHTML = "Date= "+ d.toLocaleDateString(); function GFG_Fun() { d.setMonth(d.getMonth() - 3); down.innerHTML = "Before 3 Months, Date is " + d.toLocaleDateString(); } </script> </body> </html> |
Output:
- Before clicking on the button:
- After clicking on the button:
