Calculated and bookmarked dates can be shared in DatePlus via. e-mail.
To e-mail any calculated date, select [Date] and then the e-mail toolbar icon.
To e-mail a bookmarked date, open the bookmarks, and select the detail disclosure arrow on the right hand row of the bookmark item, to open the bookmark details. In the details view select share.
DatePlus composes a mail with the date and attached is an iCal file. The iCal file can be imported in to Google Calendar on the web, iCal on the Mac, or Outlook on Windows, simply by double clicking the file.