8.40pm: At a Tesco Express on Regent Street in Clifton Village - about a quarter-of-a-mile from her flat - Miss Yeates bought a pizza, which is missing. She then visits a nearby off-license to pick up a bottle of cider.
Police believe she returned home to her flat in Canynge Road, which she shared with Mr Reardon. A receipt from Tesco was found in the flat, along with a cream-coloured coat she had been wearing and her mobile phone and keys.
:: December 19
Mr Reardon reports Miss Yeates missing when he returns to Bristol from a weekend away visiting relatives in Sheffield.
:: December 20
Avon and Somerset Police make their first appeal for information over Miss Yeates' disappearance. Officers said they were concerned for her safety because it was out of character.
:: December 21
Miss Yeates' parents, David and Theresa, make their first tearful appeal for information at a police press conference in Bristol.
Appealing directly to their daughter, they said: ''Jo, whatever the reason that you have not been in touch over the last few days, we want you to know that we love you dearly and are desperate to know that you are safe and well.
''Please get in touch as soon as possible. Either to the police or anyone who can confirm you are okay.''
:: December 22
Mr Reardon spoke of his distress at the disappearance of his girlfriend.
''I desperately want her back - I thought we would be together forever,'' he said from Miss Yeates' parents' home in Ampfield, Hampshire.
''She was my future. This Christmas was going to be our first together. I was going to spend it with her family, which is always a big deal for a boyfriend.
''We were both really happy in our jobs - we worked together and that's how we met.''
Specialist officers have been searching the couple's flat, as well as the snowy Bristol Downs and Avon Gorge.
They have also taken a phone and laptop computer from Mr Reardon as part of the inquiry.
:: December 23
Miss Yeates' parents make a second tearful appeal and reveal their fears that their daughter has been abducted.
Mr Yeates begged her potential kidnapper: ''If she's dead, please tell somebody where she is.
''I think she was abducted after getting home to her flat. I have no idea of the circumstances of the abduction because of what was left behind.
''I feel sure she would not have gone out by herself leaving all these things behind and she was taken away somewhere.''
Detectives said that when Miss Yeates was in the Tesco Express she had bought a Tesco Finest tomato, mozzarella and basil pesto pizza. However, there was no trace of the pizza, the wrapping or the box in her flat.
:: December 24
Police release new CCTV footage showing Miss Yeates buying the pizza in the Tesco Express on the night she was last seen.
A spokesman says: ''The video has been released by detectives hoping people in the area at the time will remember seeing Joanna and contact the police.''
:: December 25
9am: A couple walking their dogs in the Failand area of North Somerset, three miles from where Miss Yeates went missing, find a body.
Her father tells a newspaper: ''Of course we don't know for sure that it's her but we assume that it is.
''Nobody else has been reported missing and it's the body of a young girl close to where Jo disappeared. It hasn't been a Christmas for us. I don't know what it's been. It's been surreal, totally unreal. We're just waiting now for the police to tell us what we suspect.''
:: December 26
Police announce they are ''satisfied'' that the body found is that of Miss Yeates.
:: December 27
The family of Miss Yeates visit the spot where her body was found. They lay a bouquet of flowers at the scene.
:: December 28
Police announce that Miss Yeates died as a result of strangulation. Avon and Somerset Police say the death is now officially being treated as a murder investigation.
Her father tells the Southern Daily Echo that he is ''relieved'' to be reunited with his daughter's body.
:: December 29
It is reported that Miss Yeates' landlord saw Miss Yeates leave her flat with two people on the night she was murdered. Detectives confirm it is a line of inquiry.
Police reveal new CCTV footage of the architect buying cider at an off-licence on the night she goes missing.