Apollo 8 was launched at 12:51:00 UTC (07:51:00 Eastern Standard Time) on December 21, 1968, using the Saturn V's three stages to achieve Earth orbit.
ɐpˈɑːloʊ ˈeɪt wʌz lˈɑːntʃt æt twˈɛlv:fˈɪfti wˈʌn:zˈiəɹoʊ zˈiəɹoʊ jˌuːtˌiːsˈiː zˈiəɹoʊ sˈɛvən:fˈɪfti wˈʌn:zˈiəɹoʊ zˈiəɹoʊ ˈiːstɚn stˈændɚd tˈaɪm ˌɔn dᵻsˈɛmbɚ twˈɛnti wˈʌn, nˈaɪntiːnhˈʌndɹɪd sˈɪksti ˈeɪt, jˈuːzɪŋ ðə sˈæɾɜːn vˈiːz θɹˈiː stˈeɪdʒᵻz tʊ ɐtʃˈiːv ˈɜːθ ˈɔːɹbɪt.