Year and country of birth from search on New Zealand BDM website in April 2021:
1920/11634. Hayes. Margaret Mary. Mother: Charlotte. Father: George Humphrey
Full date of birth of 21 March 1920 from further searching in April 2021 on BDM Search by incrementally changing the date range for the birth.

No record of marriage could be found on the New Zealand BDM website as at May 2021.

Name of husband, from New Zealand Electoral Roll - Wairarapa Main Roll 1972, found in May 2021:
Smith, Margaret Mary, 28 Main St, Greytown, married
Smith, Lloyd Malcolm, 28 Main St, Greytown, fencer

Brian of nzolivers notes that this Margaret Mary HAYES was already in the tree:
This Margaret Mary HAYES is the sister of George Humphrey HAYES, who married Gwendoline Jean BAMBRY. George and Gwendoline’s daughter is Bernadette Jean (Bernie) HAYES. (Bernie is John and Toyah Churton’s maternal grandmother).

Year and country of death, date of birth confirmed, from death search on New Zealand BDM website in May 2021:
2013/22356. Smith, Margaret Mary. Date of birth: 21 March 1920

Full date of death of 27 August 2013 from further searching in May 2021 on BDM Search by incrementally changing the date range for the death.