every 2 years (on even year)

bryanqu,

There’s a plugin that some others are using called ‘Widget Logic’ which adds an advanced way to show/hide widgets. There’s some clever stuff going on if you read this thread: https://wordpress.org/support/topic/plugin-widget-logic-conditional-date-tags?replies=21

I would suggest to try using that combined with two recurring timer widgets (only show one at a time). You may have to update it manually, but at least it would only be every two years 🙂