Hi,
There is some good documentation on recurrence sections in another part of the docs (https://cylc.github.io/doc/built-sphinx-single/index.html) I often look back to this list of examples (https://cylc.github.io/doc/built-sphinx-single/index.html#advanced-examples).
Hillary’s solution is the nicest (to those familiar with Cylc’s internals):
R/^+P1Y/P1Y
There is another approach which has it’s place which is to exclude (!) the intitial cycle point (^) from the recurrence:
R/P1Y!^
https://cylc.github.io/doc/built-sphinx-single/index.html#advanced-exclusion-syntax