Datum

It’s probably just something we invented along the way to help us with daily activities, but it is close to impossible to imagine modern life without the concept of time. Windows puts a clock at your disposal to always be on track with your schedule. What’s more, advanced applications like Datum give you the possibility to calculate future, and past days.

Can be used on the go

One thing you notice right after download is done, you are able to run the application directly, without having to spend any time, or effort to install the application. However, you need to check if the computer is fitted with .NET Framework, because it’s a required component for proper functionality. You can use it from a USB flash drive, meaning registries remain intact during, and after use.
When launched, a compact, well organized main window shows up, making it easy to get acquainted with features at your disposal. A side panel lets you access all areas with a single click, while the rest of the space gets filled with corresponding value fields, providing the result right after confirmation.

Good, but far from being a pro

The application’s core function is to enable you to calculate number of days based on dates. As such, you’re able to add a specific number of days to the present date, subtract to see a past date, or pick two dates in order to view the difference in days.
Regardless of the result you want to obtain, you always work with a date field, which benefits from a cool calendar, making it easier to pick days of interest. Don’t forget to press Return/Enter after configuring values, or result is not shown.
You’re free to add or subtract up to 99,999 days, which isn’t that much of a convenience, considering we live roughly 100 years in the best case scenario. The date difference feature, on the other hand, shows results in a rather disappointing way, in the sense that years, and months are not shown, but just days.

To end with

All things considered, we can say that Datum is a practical little utility you can use on the go to calculate days to come, or past dates, even the difference in days for two fixed dates. However, results can’t be saved to file, nor copied, while the lack of an option to pick format might leave more to be desired.