## Calculate Time Difference

### Description

The dialog called "Calculate Time Difference" can help you to calculate the time difference between two timestamps. Specify Moment A and Moment B by using the dialogs Date Picker and Time Picker or simply enter the timestamps directly to the two textfields. By default both timestamps are in the same timezone, but you also can specify the two timestamps being in two different timezones. You can do this by specifying a timezone from the combo box. If a timestamp is in Daylight Saving Time (DST), the sun icon will shine.
Time differences can be interpreted exactly, colloquially or as interest dates.

#### Exact

That is the exact time difference including leap seconds if applicable that has been passed (or will have been passed) between two timestamps. Weeks, Days, Hours, Minutes and Seconds can be deselected for the output. If you do that, you get higher values for the next lower unit. For example, if you deselect hours for a time difference of 2 hours, the minutes value will be incremented by 120.

#### Colloquial

That is the colloquial output for the time difference between two timestamps. Years, Quarters, Months, Weeks, and Days can be deselected for the output. Hours, Minutes and Seconds will be ignored for the colloquial output.

#### Interest Days

That is the interpretation of a time difference as an Interest Date. Hours, Minutes and Seconds are being ignored. For now the following methods are supported:

- German [30/360]
- German (Spareinlagen) [30/360)]
- US-Englisch [30(28/29)/360]
- US-Englisch (NASD) [30/360]
- English [act/365]
- French [act/360]
- ISMA [act/act]

See also http://en.wikipedia.org/wiki/Day_count_convention

### Example

In the following example, values have been entered that represent both the birthday of Douglas Adams and also the day when he died. Did you know? The digit sum of the minutes of that duration is 42 ;)