Berrington, who lived in a flat on Fergusson Drive, was reported missing the next day.
Later, a witness reported seeing a woman matching her description walking towards Fraser Cres around midnight.
Despite a large-scale search and rescue effort - which involved both authorities, members of the community and family and friends - there has been no sign of her.
Her bank account has also not been touched.
A year on since her disappearance, Berrington's family have made yet another heartfelt appeal for anyone who may have information about her whereabouts.
"As a family, we are still trying to come to terms with the ongoing situation of mum's disappearance.
"We never thought it would go on this long. We hope we have some answers one day soon.''
The family acknowledged those who had helped them over the last year; thanking them for their continued support.
Have you seen Mary? Contact Hutt Valley Police: 04 560 2600.
