Jawaharlal Nehru states regarding recording the birth of a child that the time that humans construct during periods of war is artificially separated from solar time. This separation occurs because human, war time, is abstracted and ahead of solar time.
Your message about the birth of the little one reached me the same afternoon as your letter giving fuller details…In my letter to Indu, I suggested to her to ask you to get a proper horoscope made by a competent person. Such permanent records of the date and the time of birth are desirable. As for the time, I suppose the proper solar time should be mentioned and not the artificial time which is being used outside now. War time is at least an hour ahead of normal time (Nehru 1963, 162).
Nehru, Jawaharlal. 1963. Nehru’s letters to his sister: Edited with an introduction by Krishna Nehru Hutheesing. London: Faber and Faber.