The championships were slated for September 24- 25 in Arusha at Sheikh Abeid Stadium.
Athletics Tanzania (AT), through the association's Technical Department Director, Michael Washa, said the event will be held from October 8-9 at the Sheikh Abeid Stadium.
He said the development follows Zanzibar's decision to host its championships from September 24-25 to select its athletes for the National Championships.
Meanwhile, Singida Regional Athletics Association Chairman, Juma Mataka, said the region's trials, which were slated for today and tomorrow at Mwenge Secondary School to select 10 athletes to represent the region at the National Championships, will be held next weekend.
Mataka noted: "The National Championships' trials which were to take place next weekend at Mwenge Secondary School in Singida, will be held next weekend.''
''This is a blessing in disguise as our athletes, who will be selected next weekend, will have enough time to prepare for the championships," he said.
Last year the two-day championships were held at Benjamin Mkapa Stadium in Dar es Salaam and were sponsored by Tanzania Olympic Committee (TOC) at the tune of 60m/-, involving 250 athletes from 28 regions.
The championships was taking place after five years of absence and TOC sponsored the event with funding from Olympic Solidarity (OS) and the Association of National Olympic Committees of Africa (ANOCA).
Tanga athlete, Mbaraka James, was the showdown's winner in the men's 1500m race, beating national team athletes, Gabriel Geay and Epimak Boniface.
James won the 1500m race in 3:47.12, Coast Region is the National Athletics Championship's defending champion.
The region's athletes won six gold medals, nine silver medals, and four bronze medals.
Arusha finished second with five gold medals, seven silver, and four bronze medals, Unguja South finished third with two gold medals, one silver, and one bronze.
Zanzibar’s, Urban West was fourth with two gold medals, one silver, and five bronze medals.
Hosts, Dar es Salaam, was fifth with two gold medals and two bronze medals, while Dodoma and Kilimanjaro were tied on the sixth position, winning one gold, one silver, and one bronze medal apiece.
Mbeya took the seventh position after winning one gold medal and two silver medals, Tanga settled for the eighth position with one gold medal.
Mwanza and Pemba South ended ninth and 10th, taking one gold medal and two silver medals respectively.