Mum & Dad VS Dad & Mum
I've been working with a British student book called "Challenges I" and I've found in many letters that the teenagers address their parents like this way:
Dear mum & dad but never seen there that the dad is written first.... it's really like that in Britain or are the authors just trying to change the "male" mentality... the thinking that men are always over all?
15 Answers
It's just like you always say
black and white,
salt and pepper,
up and down etc.
Fixed phrases, collocations 
I'm with Kevin on this, always Mom and Dad. It is Mr. and Mrs. when used formally in address but dear old Mom always takes precedence in the family situation. 
No, it's like that everywhere in English. I don't know if there's a rule, but I've never heard "Dad and Mom", always "Mom and Dad".
I am so glad to see this thread. My mother always signed cards with, "Dad and Mother." I always thought it was a bit unusual. I prefer, "Mom and Dad"
There isn't a rule. Both options are grammatically correct, but the common phrase is Mom and Dad; although, I am not sure why.
Point of order - we Brits don't use 'Mom', but 'Mum'.
I would always, always say 'Mum and Dad' and never the other way around. Equally, if I were being more formal, I might refer to my 'Mother and Father' but again, not the other way around.
On the other hand, in Mexico it's more common mentioning dad first... according to a google search:
- papá y mamá =7,870,000 results
- mamá y papá =6,190,000 results
Very interesting! The odd thing is the other day I was thinking about how in English you commonly say 'that's in black and white' but in Spanish..... 'blanco y negro'. 
Both are right, but I'll let Google show you which is more common:
Search for:
"mom & dad" - 4,420,000
"dad & mom" - 201,000
Obviously, mom & dad is far more common.
I disagree. Mom & Dad may be more common but Dad and Mom is fine too.
I think it's just habit that we say Mum and Dad in English. I'm sure it will be different in other languages. In Cantonese, it is "Baba, Mama", so it's the other way round. I seem to remember it is the other way round in French, too; as in "Bonjour, Papa, Maman".
I agree with both. Grammatically speaking, they are both fine. However, it just sounds kind of weird when you say "dad" first. From this moment forward, I'm going to make a conscious effort to say "dad and mom", just to see if I can start a language revolution!
See this link!
"Mum" sounds very U.K. There is nothing wrong with that, just a regional difference.
Just to add to it, I usually sign the cards or gifts to our kids as: Mom and Dad. But yes Leatha and Beatrice, either way is correct.
