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:
- 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 > |
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Output:
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Before clicking on the button:
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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 > |
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Output:
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Before clicking on the button:
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After clicking on the button: