Ask those super-pious Bible Christians. They always find a reason why something is forbidden or verboten.
I am not familiar with Black Forest Fasnacht. Would a New Years celebration at times square count as a Carnival? For me it is difficult to distinguish between a gathering for a celebration and a carnival. What attributes must a carnival have?
Never! Never ever! Carnival always follows the moon - like Easter. Carnival is always exaxtly before Ash Wednesday. You cannot have Carnival or Fasching or Fasnacht at any time in the year.
Problem is 'Carnival' means slightly different things in different countries. A carnival is the US is a circus. A carnival in Italy historically has a quasi-religious links to Roman Catholicism but to all practical effect that connection was lost centuries ago. The chief problem though is I think your use of the term 'celebrate'. Most European nations for example 'celebrate' birthdays yet they are not celebrated in any religious sense. At the same time lots of atheists 'celebrate' Christmas which does have a religious meaning to many people yet has none what-so-ever to them! Bit confusing I think.
@ Ash Wednesday https://en.wikipedia.org/wiki/Ash_Wednesday You cannot have Fasching or Fasnacht or the German "Karneval" at any time in the year. It must be before Ash Wednesday. Between Epiphany and Ash Wednesday.
So maybe that connection was lost in the US. It has not been lost here. So maybe I should write Karneval instead of Carnival.
In which case it has quasi Roman Catholic roots which means devout Protestants should/would not 'celebrate' it. The problem remains however the definition of the word celebrate. For all intents and purposes Karnival long ago lost any connection to it's religious roots. In most peoples minds these days it simply means 'party' and hence the vast majority of people treat it as such i.e. a party, nothing more.
Romans 14:1-9 NLT Accept other believers who are weak in faith, and don’t argue with them about what they think is right or wrong. [2] For instance, one person believes it’s all right to eat anything. But another believer with a sensitive conscience will eat only vegetables. [3] Those who feel free to eat anything must not look down on those who don’t. And those who don’t eat certain foods must not condemn those who do, for God has accepted them. [4] Who are you to condemn someone else’s servants? Their own master will judge whether they stand or fall. And with the Lord’s help, they will stand and receive his approval. [5] In the same way, some think one day is more holy than another day, while others think every day is alike. You should each be fully convinced that whichever day you choose is acceptable. [6] Those who worship the Lord on a special day do it to honor him. Those who eat any kind of food do so to honor the Lord, since they give thanks to God before eating. And those who refuse to eat certain foods also want to please the Lord and give thanks to God. [7] For we don’t live for ourselves or die for ourselves. [8] If we live, it’s to honor the Lord. And if we die, it’s to honor the Lord. So whether we live or die, we belong to the Lord. [9] Christ died and rose again for this very purpose—to be Lord both of the living and of the dead.
May I repeat: What do you understand under the term "Carnival"? a circus a merry-go-round any kind of celebration a cruise line nothing According to my experience, many English-speakers do not have the faintest idea, what a Carnival is.
To that I can only say: No, it ain't! In any case, the German Karneval and the Fasching and the Fasnacht is much more than just "a party". Much much more.
To that I say: Our Carnival here is NOT a "Catholic thing". On the contrary. For a long time Carnival was an anti-church thing and the Catholic church was very much opposed to it. About the roots: The Carnival has "pagan" roots and liked to make fun of any church and any government. It was also a spirit of rebellion against any authority. And that is not all! The German Fasnacht is a many-splendoured thing.
No Christian should flash her breasts in New Orleans for beads. No Christian should samba in the streets of Brazil wearing only a thong and body paint.
Christmas was a carnival Holiday until Americans reinvented it "Christmas history in America" https://www.history.com/topics/christmas/history-of-christmas "The pilgrims, English separatists that came to America in 1620, were even more orthodox in their Puritan beliefs than Cromwell. As a result, Christmas was not a holiday in early America. From 1659 to 1681, the celebration of Christmas was actually outlawed in Boston. Anyone exhibiting the Christmas spirit was fined five shillings." "It wasn’t until the 19th century that Americans began to embrace Christmas. Americans re-invented Christmas, and changed it from a raucous carnival holiday into a family-centered day of peace and nostalgia. "