After downloading and installing Hebcal on my Outlook calendar, i can see on my desktop but is not syncing with my Android phone. How to have dates appear on the phone?

Note that there appears to be a limitation in Android calendar where events more than one year in the future will NOT sync to your device. The events are visible on the Google Calendar on the Web but will not download to the device until the current date approaches more closely.

See these articles for more detail:

How do I sync Google Calendar events that occur more than one year in the future?

Android Bug #41281