Peter Lawrence is planning a series of events to mark his daughter's birthday
The father of Claudia Lawrence said the new year will bring no let up in his campaign to find his daughter, who he believes is still alive.
Peter Lawrence, 63, has made continued appeals for help to find Miss Lawrence, from York, North Yorkshire, who has not been seen since 18 March.
The solicitor said he hoped her 36th birthday on 27 February would provide a new focus for the search.
Mr Lawrence added: "I will never give this up."
Miss Lawrence was last seen near her home on 18 March.
She was reported missing after she failed to arrive at work at a kitchen at the University of York the next day.
Police are treating her disappearance as murder, but Mr Lawrence said he believed his daughter was alive.
He said: "We will keep the campaign going. We will never give up until we find Claudia.
"I believe my daughter is still alive, the hope is just as strong."
Plans are under way for a Claudia Awareness Day event in York on her birthday and another in London the previous day.
Mr Lawrence is asking for suggestions from anyone who may have a good idea about how to mark the day, which he said would be "another difficult occasion".
His friend and spokesman Martin Dales said: "The idea for the day has come from her friends and members of the general public who through Facebook, e-mails and FindClaudia.co.uk have expressed their desire to want to do something to help keep Claudia's profile raised across as wide an area as possible.
"Although we are still in the early stages of planning and already have some ideas, we would very much like to hear from people with their own ideas so that as many people as possible can be involved and be a part of this special day."