Michael J. Radwin: 

Once I remove my current iteration of Hebcal from Google Calendar, how do I then get the link for the tradition I want to follow? Thanks.

Thank you for your reply and the important information. I never learned that there is more than one way of determining halachic times. Since I use Hebcal's calendar link through Google Calendar, can you advise how I can change the havdalah time calculation for my account? I clicked on the Settings in the Hebcal icon but didn't see a way to change it. Is there a different Hebcal link I should use in Google Calendar? Thank you, Scott.