Right way to provide ARIA text on <time>?

[edent]

Consider the following HTML:

<time datetime="2018-07-07T12:34>1H</time>"

A sighted user, seeing that in context, will (probably) understand that means "One Hour Ago". A screenreader will probably read out "One Aitch".

Is there a correct way to give text to a screen reader? Hypothetically

<time datetime="2018-07-07T12:34 aria-text="1 hour ago">1H</time>"

The reason I ask, Is that I've just discovered the way the BBC do it:

They hide the "1H" with aria-hidden and hide the screen-reader text using CSS. This feels inefficient!
I think this is related to #878 and #898

[jnurthen]

@alia11y is this something that fits better into the pronunciation task force work?

[jnurthen]

I'm going to mark this as a duplicate of #767 as it seems like the same thing to me. Please feel free to reopen if you disagree