Indian Chronology (Solar, Lunar and Planetary): A Practical Guide to the Interpretation and Verification of Tithis, Nakshatras, Horoscopes and other Indian Time-records, B.C. 1 to A.D. 2000 c32.16

Now, 27 divided by 7 leaves 6, i.e., Friday which, according to all accounts, was the first week-day of Kaliyuga.