The ASX is typically closed on national public holidays, which means you will want to get your trades in the business day before or have to wait till the next open day.
These dates are for Australian investors, New Zealand investors should consult the ASX news and announcements page, or the full calendar link found at the bottom of this page.
Key ASX Dates in 2020
New Year’s Day, Wednesday 1st January – Closed
Australia Day, Monday 27th January – Closed
Good Friday, Friday 10th April – Closed
Easter Monday, Monday 13th April – Closed
Queen’s Birthday, Monday 8th June – Closed
Christmas Eve, Thursday 24th December – Trading Closes at 2.30pm (Sydney Time)
Christmas Day, 25th December – Closed
Boxing Day, Monday 28th December – Closed
New Year’s Eve – Trading Closes at 2.30 pm (Sydney Time)
The full ASX trading calendar is available on the ASX (PDF): https://www.asxonline.com/content/dam/asxonline/public/notices/2019/Sept/asx-trade24-2020-calendar.pdf