Inspector Simon Young said: “We are appealing for anyone who may have seen Daniel after he left home.
"He has not been in contact with his family or friends since then and may be in a distressed state which is why we are concerned about his welfare.”
“We have done everything possible to find Daniel since he was reported missing but have not been able to locate him.
"We are now appealing to the public to get in touch immediately if they see him or know where he may be.”
Anyone who sees Daniel is asked to contact Kent Police on 101, giving reference 22-0299.
More top news
The RMT union has accused Southern of inventing figures which the company claims show record numbers of guards are going sick.
Thursday morning's weather for the west of the region
Thursday morning's weather for the east of the region