The two-day celebrations, which started on Saturday afternoon, marked 100 years since the foundation stone was laid by local farmer and benefactor Robert Jackson, on November 23, 1911.
That Presbyterian church has been added to over the years and now is the centre of what is known as the Columba-Waiareka-Weston Parish.
There were memories aplenty for those at the centenary event, including for Doug Wallace (77).
Among the gowns, which included that of Mr Wallace's mother Betty when she married Bill Wallace at Balclutha in 1932, was a pageboy's outfit.
Mr Wallace wore that only once - at the wedding of his Uncle Ted and Aunt Edna Perkins in 1940 at Balclutha.
The outfit has been kept in his family ever since.
He recalled he was not keen to be pageboy, and now the outfit had come back to haunt him.
On Saturday afternoon, after a welcome by parish minister the Rev Nancy Parker and centenary co-ordinator Bev Rodwell, the anniversary cake was cut by baby Will Hudson - helped by his mother Sonia - who is the youngest dedicated member of the Weston congregation.
Accompanying him was the Rev Allan Simpson, who served the church between 1954 and 1960.
Noeline Simpson, who along with the late Margaret Bradfield, was the first woman elder in the church in the mid-1970s, recalled that the male elders wondered "what to make of us".
The presence of the great-granddaughter of Mr Jackson, Beverley Hentschel (Christchurch), with his great-grandson John Martyn (Gore) and great-great-granddaughter Mary-Kay Martyn (Gore) added to the sense of continuity of history.
Mr Jackson was a dedicated Christian, farmer and elder of the Presbyterian Church and had already served the church for 40 years when the foundation stone was laid. His name also appears on the foundation stone of the Weston Hall.
Tenders were called for the Weston Church in January 1911, but the cost was beyond the resources of the church.
The plan was modified and Mr William Henry Harbour, carpenter of Oamaru, was given the contract.
The church was opened on April 7, 1912.
Over the years, Weston Church has been served by 14 different ministers.
