As anyone who has gone within half a mile of a school will know, today is World Book Day, and children in the UK and Ireland have been encouraged to dress up as their favourite book character.

However, many children appear to have begged their parents to go dressed as their favourite character full-stop, resulting in a plethora of film characters alongside the Where's Wally and Harry Potter contingents.

One has made her presence felt more than the others.

I'm seeing a lot of "Here are my kids on #WorldBookDay dressed up as Elsa and Anna"... pic.twitter.com/EcUOf5fyKF — David White (@davidwhite_) March 5, 2015

On social media, annoyance over Disney's all-conquering film Frozen taking over World Book Day is threatening to trump the irritation over children dressed as comic book characters.

The boy dressed as an oompa-loompa in a sea of Elsa's and superheroes is my idol #WorldBookDay — Sara (@Saraurora) March 5, 2015

Comic book characters should absolutely count as being from books! Wait, wrong argument. Moving on.

The debate on whether Elsa and Anna should feature at all on World Book Day has split people into three camps:

Camp 1: "Frozen is a film! It bears about as much resemblance to Hans Christian Andersen as Sebastian the Crab does to The Little Mermaid"

#WorldBookDay A little girl is dressed up as Elsa from Frozen. I want to shout at her, THAT’S NOT A BOOK. — Benjamin Johncock (@benjohncock) March 5, 2015

Saw a few Elsa's on the way in this morning. You know, from that classic book, the Frozen DVD booklet. #WorldBookDay — Edwards80 (@Edwards80) March 5, 2015

Ok if anyone can find one child inspired to read today by dressing up as Elsa or Ironman I will give you ONE MILLION DOLLARS #WorldBookDay — Cybbo (@CybillLiberty) March 5, 2015

Predictably a load of kids have gone to Violet's school dressed as Elsa for #WorldBookDay... I'd send them all home personally — Andy (@BroomOwl) March 5, 2015

Enjoyed listening to @malorieblackman talk about encouraging kids to read while passing a million Elsa & Annas on the way to school LOL #WBD — Jennie Rawlings (@HelloSerifim) March 5, 2015

Camp 2: "Frozen is based on Hans Christian Andersen's The Snow Queen, a totally legitimate fairytale"

Elsa/snow queen #anyexcusetowearthatbloodydress #worldbookday A photo posted by Rebecca Inskip (@rebecca81811) on Mar 5, 2015 at 12:58am PST

Kid dressed as Elsa for #WorldBookDay because the film was written as a book eventually, right? 😁 #aStickerBook ;) pic.twitter.com/YZDZMCfrsL — Suz Korb (@SuzKorb) March 5, 2015

“@Joulesclothing: fantastic outfits this #WorldBookDay! Who has your little one dressed up as?” Queen Elsa pic.twitter.com/MM8eAceL1h — Jess Positive (@jesspositive) March 5, 2015

Camp 3: "Seriously, who cares. Have you tried to wrangle a small child of iron will into a costume lately?"

#WorldBookDay She insists on going to nursery dressed like Elsa 😩 #FrozenFiends — Clottey (@ClaireClottey) March 5, 2015

Mercy dash to Tescos to get "Elsa" dress! Grrr! #WorldBookDay #badmother — Buggysnuggle Sarah (@SarahBuggysnug) March 5, 2015

It isn't only Frozen which has inspired a creative take on what counts as a book. Jeremy Clarkson from "the Top Gear book" may well be our favourite costume of the entire day.

@JeremyClarkson world book day and my son wants to go as you. Sorry you're having a bad hair day! pic.twitter.com/dqfg5zWvlB — Caroline Peek (@CarolinePeek) March 5, 2015

My boy as Jeremy Clarkson @BBC_TopGear for #wbd looks more like Richard Hammond! pic.twitter.com/CqtNyOicSp — Chris Bridgett (@ChrisBridgett) March 5, 2015

Some would argue that Fifty Shades of Grey doesn't count as literature, but that didn't stop this schoolboy from Manchester from dressing up as Christian Grey.

offensive costume.Excluded from photos, told to change yet teacher dressed as a serial killer and others with guns? pic.twitter.com/8OTZ9gPvEh — nicola scholes (@clangar) March 5, 2015

Many parents were thrilled that their children decided to dress up as characters who weren't from Frozen.

My 3 y/o niece was the only non-Elsa in her class for #WorldBookDay. She went as the Very Hungry Caterpillar. I love her so much! — Jen (@Brummie_Jen) March 5, 2015

Really, as long as your child reads, and is happy, that's all that matters.