All three of these time scales were defined to read JD 2443144.5003725 (1 January 1977 00:00:32.184) exactly at that instant.
ˈɔːl θɹˈiː ʌv ðiːz tˈaɪm skˈeɪlz wɜː dᵻfˈaɪnd tə ɹˈiːd dʒˌeɪdˈiː tˈuː mˈɪliən fˈoːɹhˈʌndɹɪd fˈoːɹɾi θɹˈiː θˈaʊzənd wˈʌnhˈʌndɹɪd fˈoːɹɾi fˈoːɹ.fˈaɪv mˈɪliən θɹˈiː θˈaʊzənd sˈɛvənhˈʌndɹɪd twˈɛnti fˈaɪv wˈʌn dʒˈænjuːˌɛɹi nˈaɪntiːnhˈʌndɹɪd sˈɛvənti sˈɛvən zˈiəɹoʊ zˈiəɹoʊ:zˈiəɹoʊ zˈiəɹoʊ:θˈɜːɾi tˈuː.wˈʌnhˈʌndɹɪd ˈeɪɾi fˈoːɹ ɛɡzˈæktli æt ðæt ˈɪnstənt.