....with the James Web Telescope looking for sources of artificial light to identify potential intelligent life, and the news this week of Perseverance searching for microbial life on Mars it feels like we are getting closer to a major discovery. But what - if anything - would it mean for the religions on Earth if life is proven to exist out there?
Christmas was placed around the winter solistice to make conversion of 'pagans' easier in an "oh my god! you have a holiday then? so do I! what a coincidence! we should totally bump religions'' manner.
But in the context of change, with respect to the fundamentals of the faith, Christmas is about as relevant to the religion as seasonal events in MMOs are to end game content. Christianity has many different flavours around the world depending on what local beliefs were absorbed. Just have a look at church calendars from different countries and see what saints are celebrated year round.
Arguing change in abrahamic religions, you probably would have had a bit more success discussing the great schism of 1054 or the protestant reformation, but even those keep the same basic belief system of existence of god, him having a son, existence of a heaven and a hell and such (fun fact - there's no purgatory in the teachings of the catholic orthodox church - the full name for eastern orthodoxy).
Or, looking at other abrahamic religions you could argue that people that practice judaism have a saying along the lines that 3 rabbis have 4 opinions on a topic - an indicator of constant change in the world'a first monotheistic religion.