Issue in date tools extension by vknow360

First of all great work @vknow360 for you wonderful date tools extensions. But I am having errors in that extension. Please help me to fix them.

It is really serious issue .

As you can see , I am trying to subtract two date and time , but is showing error . I mean the output is really confusing. Please help me.

2 posts were merged into an existing topic: DateTools : Some tools to work with date and time