Can't really advise on curriculum/ etc... but as a parent....
Good communication/ welcoming atmosphere critical
Early information to parents - if problems are presenting themselves - don't wait until parents' evening in 3 months time. 3 months is a long time at this age. You should have e-mail & most parents can be e-mailed/ texted - so really a quick note/ e-mail/ text is all that is needed (please catch me after school tomorrow/ today). Doesn't take a huge amount of time does it?
INFORMATION on EYFS: what it is/ assessment criteria/ how you will explain how children are progressing against this to parents.
INFORMATION on early maths - how to support it at home/ what is learned when/ resources parents might find helpful (webpages/ APPS)
INFORMATION on early reading/ phonics - how to support it at home/ what is learned when/ resources parents might find helpful (webpages/ APPS).
PLEASE don't presume parents know what happens at the school. MUFTI day may make sense to you, but usually there are a group of children which have no idea that meant non-uniform day. Why not just send a note explaining that to new children (YR or otherwise) what to do (or post it on the school diary - just add a line - children can come to school in costume or ordinary clothes - uniforms are not required). Sports Day may mean come in your PE kit or ordinary shorts & a t-shirt - but if you don't tell parents that - how are we to know and saying you told all the 4/5 year olds to pass on the message is pretty cr** frankly. (50% of Year R in DD1s class didn't understand that and certainly my DD1 was in floods of tears - fortunately I could nip home and get her some shorts & a t-shirt).
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Finally on the first day of school - don't hide in the classroom - come out and introduce yourself to parents/ children (and I include HTs in this).
For many parents the first day of school is a big deal - let them take a picture of their child with you or in front of the school gate (don't run to them shouting they're not allowed to - saw that approach reduce one parent to tears).
Our school may be the problem, but I've weathered years (7 now) of watching Year R children sobbing before going into their class - and teachers/ TAs don't even attempt to comfort the child. I know some of this behaviour is attention seeking (either of parent/ teacher) but a bit of compassion would not go amiss.
HTH