The use of ‘through’ in the wording used when a user is set to away - eg “away through Monday” - isn’t used in the UK, so causes confusion about when someone will return. It’s not clear whether that means they are back on Monday or Tuesday. https://asana.com/guide/help/fundamentals/settings says it means Tuesday, but my instinct would have been Monday.
It would be more common to say “back on Monday” if someone was going to return on Monday.