The supermarket has been joined by Scribbler, whose Mother’s Day offerings include a "Two mums are better than one" card for same-sex couples.

London - British supermarket chain Waitrose has been selling Mother’s Day cards that do not specify a gender in a bid to make the celebration more inclusive.

As part of its Mother’s Day range, the supermarket offered cards bearing the greeting ‘Happy You Day’.

It said the card had been designed to allow people "to thank anybody they choose to" and the move was about "broadening out who the cards can go to, whether it’s grandmas or transgender mums".

The supermarket has been joined by Scribbler, whose Mother’s Day offerings include a "Two mums are better than one" card for same-sex couples.

Another on offer at the greetings-card retailer said: "Dad, thanks for being the most amazing mum."

READ: When fathers are mothers

The move, reported by the Sunday Times, comes after calls from activists to rename the celebration – with suggestions for a replacement including Guardian’s Day and Carer’s Day.

Transgender campaigner Karen Pollock said the traditional name, Mothering Sunday, was more inclusive as anyone could be considered as "mothering".

This year, Mother's Day will be celebrated on 13 May.