Loading collection data...
Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
Because last and today are Data objects. Date objects encapsulate an integral number that represents milliseconds since the midnight at the beginning of January 1, 1970, UTC. In other words today and last in milliseconds. So to get the days the denominator must also be in milliseconds.