The params for the link in the the email should use the Y-m-d format so that the worked at field works right.

[zspencer]

When you click a link from the check in email, it fills it with a fluffy human friendly date that isn't interpreted properly.

Possible Approaches

1. We make sure when we print the url to the check in page we use a date format that Ruby natively supports (i.e. 2017-05-02) instead of a human friendly one
2. We could use chronic or a similar gem to parse human-readable dates.

I have a slight preference to printing the date better.