What are the anniversaries we will be commemorating in 2018?

If you want to be less precise, you can use the phrase cothrom an ama seo - around this time as in cothrom an ama seo dhá bhliain ó shin - around this time two years ago or buailfidh mé leat cothrom an ama seo amárach - I'll meet you around his time tomorrow. But what about historical anniversaries?