## Description

Calculation of depreciation is 5 years in the past date whereas it is supposed to be 5 years in the future date.

## Steps to Reproduce

Here's an example:

If the Depreciation Effective Date is 01/09/2020, the ending date for depreciation would be 01/09/2025.

At that time, there will have been 2 leap years. Thus, the number of days between 1/9/2020-1/9/2025 is 1827 days.

Current script is looking backward and determining the number of days between today and 5 years ago.

So, it is looking at 1/10/2015-1/10/2020 which is 1826 days.

This would throw off the calculation of the daily amount of depreciation.

If the Cost = $1200 and Salvage=0, the daily calcs using today as date to calculate depreciation:

Your script: (1200/1826) * 366 = 240.53 (daily amount is .65717415)

Using future days: (1200/1827) * 366 = 240.39 (daily amount is .65681444)

## Workaround

The function '_getSLDepreciation' in 'DepreciationCalculations' script include need to be changed to the below:

_getSLDepreciation: function(offset, value, salvage, dep_date) {

var netbook = (value-salvage);

var dep_end = new GlideDateTime(dep_date).getDate();

var now = new GlideDateTime().getDate();

dep_end.addYears(offset);

var depreciation = (netbook / this._daysBetween(dep_date, dep_end)) * this._daysBetween(dep_date, now);

if (depreciation > netbook)

return netbook;

else

return depreciation;

},

**Related Problem: PRB1385953**