I have just booked a room with lounge access and the booking contains the following comprehensive information about the lounge times and offerings:
Additional Information
** Executive Lounge Access Everyday ** RECENTLY RENOVATED **
- EXECUTIVE LOUNGE SERVICES *NOW AVAILABLE EVERYDAY*
- Breakfast from 6am until 10am.
- Happy Hour from 6pm until 8pm.
- Evening Tea starting from 8pm - Sunday to Friday.
- Snacks and drinks all day long.
Not sure what "evening tea" consists of - or why it isn't offered on a Saturday. But the lounge sticky correctly shows the lounge as open on weekends.
The booking confirmation also says:
- Complimentary airport shuttle from 6am until 24pm