For the first time in its history the event will not go ahead, on its 40th anniversary which was set to happen on June 12 and 13.
The Anything But Book sale on April 16 has been postponed, and the Mainfreight Donation Collection Day on March 29 has been cancelled.
Regent Theatre director Sarah Anderson said the 24 Hour Book Sale would have been the culmination of years work by over 50 volunteers.
"We do not cancel this lightly, but cannot risk the well-being of those same volunteers, the musicians who entertain us or our loyal book buying public.
"The health and well-being of our team and everyone who visits our venue is our priority."
Supporters who wished to donate items for either sale were asked to hold on to them for the time being, as all collections are cancelled for the foreseeable future.
"Please do not drop your books off at the theatre.
"We will let everyone know when collections and drop-offs are reinstated and appreciate your understanding.
"Next years sale will be spectacular."
In addition, the following productions have been cancelled or postponed:
- The Soweto Gospel Choir March 29 Cancelled
- Anything But Books Sale April 16 Postponed
- The Ten Tenors April 18 Postponed
- Les Misérables May 7 to 16 Postponed
- Moscow Ballet Sleeping Beauty May 22 Cancelled
- Showquest 2020 May 25 Cancelled / Postponed
- Yesterday Once More May 28 Postponed
- BANFF Mountain Film Festival June 4 Cancelled
- Regent 24 Hour Book Sale June 12 and 13 Cancelled
- World of Musicals June19 Cancelled / Postponed
- Matariki Glow Show June 30 Postponed
"We continue to monitor the situation and are mindful of evolving guidelines on both business and personal practice.
"We will endeavour to provide as much notice as possible regarding any further cancellations or postponements and appreciate our community's understanding and support during this challenging time.
"While our box office remains open currently, we ask people to follow Ministry of Health advice and stay home if they are feeling unwell, practice good coughing and sneezing hygiene, and frequently wash or sanitise their hands."
