The poem that Phyllis reads at the funeral is 'Turn Again to Life' by Mary Lee Hall.
This episode reveals that Sister Monica Joan's birthday is the 25th of November in that it is the same day that John F Kennedy's funeral service took place.
The picture shown at the end featuring the three older nuns is the same picture that mature Jenny Lee is shown to have on her mantle piece in Christmas Special (2014) except the background has been edited. In the S4E0 picture the nuns are standing outside of Nonnatus house; in this episode it has been edited to look like the nuns are standing in front of a bomb site during/after WW2.
Shelagh mentions Sister Evangelina by name as they are preparing the maternity home for the extra patients. This is the fourth time Sister Evangelina has been mentioned by name since she passed away in Episode #5.8 (2016). The first mention was also by Shelagh in Christmas Special (2016) as she commented on what Sister Evangelina would do when working with limited resources. The second mention was in Episode #6.4 (2017) by Sister Monica Joan as she tells Valerie that it was Sister Evangelina and she who delivered Valerie. The third was in Christmas Special (2017) when Nurse Phyllis Crane suggests that she could have offered Sister Evangelina's bathrobe to Christopher as it would have been 'masculine enough' but that was not possible because it had been donated to charity.
Sister WInifred, in leading prayers at chapel, mentions 'Michael, our Archbishop'. Michael Ramsey was the Archbishop of Canterbury from 1961 to 1974. She also mentions 'the factory explosion in Japan'; this is likely a reference to the Miike coal mine disaster on November 9, 1963, which claimed the lives of 458 people.