The thing I always notice is how modern customs still revolve around the same themes as before. Samhain was a Festival of the Ancestors, and we have Remembrence Day on the closest Sunday at this time. Mothers Day (in the UK) is closest Sunday to the Spring Equinox with its connections to fertility and conception. Father's Day is closest Sunday to Midsummer and the Festival of the All Father, and all the manly connections that has which are still celebrated at Highland Games; with races, competitions and sports (tossing the caber, pallic or what?). First harvest festivals and last harvest festivals are all the same, and the Child of Light at Winter Solstice is the same in most religions.