Since Friday morning, more than 3 million parcels have been delivered across the country, with its drivers working across Saturday and Sunday, the enterprise reports.

On Monday, Australia Post expects to set a new delivery day record, with more than 3.1 million parcels expected to be delivered, eclipsing the record set last year.

The massive shopping event, which saw some retailers kick off sales as early as Monday November 23, has seen Australians embrace online with e-commerce up more than 45 per cent year-on-year for the sales period, Australia Post reports

For the month of November, Australia Post has already delivered more than 40 million parcels, with an average of more than two million parcels being delivered daily across its network every day this month.

Australia Post deliveries executive general manager Rod Barnes said Australians had come to rely on online shopping this year, and had fallen in love with the convenience.

"Our people have worked incredibly hard all year, demonstrating agility and resilience to manage volumes we would traditionally have had months to prepare for," Mr Barnes said.

"We've made the right investments in our network and stand ready today to set a new record - the busiest day in our 210-year history - as we head towards our biggest peak in history."

Mr Barnes said in a challenging year, the organisation had continued to find ways to improve its service, with more than more than 60 new or repurposed facilities to support additional parcel processing and retail parcel pick up locations.

It also has new automation coming online right across the country in the lead up to the Christmas period, has hired 5000 extra people, chartered 18 freighter flights and will have 3000 extra vehicles on the road.

"Temporary regulatory relief has enabled the upskilling of 2700 posties including 2000 now delivering in vans, so we are ready to get a record number of parcels to their destinations and spread Christmas cheer for Australians everywhere," Mr Barnes said.

Online shopping trends recently have indicated categories such as food and liquor, home and garden, variety store purchases and health and beauty have all been booming, up 72 percent from this time last year, with traditionally popular Christmas categories such as toys and games, and fashion and jewellery also tipped to fill stockings again.

With more posties and drivers out delivering more parcels than ever before, Australia Post is reminding the community to help keep them safe by looking out for them on the road and keeping dogs secured if they are expecting a delivery.