As a public service, I created a series of public Google calendars pre-loaded with all candle lighting and Havdalah dates and times for several years. These calendars can be integrated to address Shabbos and Yom Tov issues with home automation or just give you candle lighting times for Shabbos and Yom Tov. I created a calendar for several time zones. There is one for New York Metro, Chicago, LA, etc. and, of course, one for Jerusalem. If you need another time zone, send me an email (firstname.lastname@example.org) and I will be happy to add it.
To add the appropriate Tribe Tech Review Public Shabbos and Yom Tov Google Calendar to your list of personal calendars, Right Click and Copy the appropriate calendar URL link below. Then go to your Google Calendar on any computer (not phone). Choose Add Friends Calendar by URL and then paste the appropriate calendar link from the time zones below: