I am trying to send a mutation to my graphql server to update a date. My mutation schema looks like this:

mutation CreateReminderMutation(

    $birthday: Date

) {

    createReminder(

        birthday: $birthday

    ) {

        id

    }

}

Then in my react component I am sending the date like this using moment.

const Calendar = () => {

   // component and mutation implementation

   birthday: moment(birthday).toDate()

}

I am getting the following error message:

[GraphQL error]: Message: Variable $birthday got invalid value
2019-03-15T12:00:00.000Z; Expected type Date; Value is not a valid
Date: 2019-03-15T12:00:00.000Z, unparsable, Location: [object Object],
Path: undefined

can anyone advise how to get the correct Date format with moment to send to graphql?