<P> This would move the starting date back three years to 8 BC, and from the lunar synchronism back to 26 January (Julian). But since the corresponding Roman date in the inscription is 24 January, this must be according to the incorrect calendar which in 8 BC Augustus had ordered to be corrected by the omission of leap days . As the authors of the previous paper point out, with the correct four - year cycle being used in Egypt and the three - year cycle abolished in Rome it is unlikely that Augustus would have ordered the three - year cycle to be introduced in Asia . </P> <P> The Julian reform did not immediately cause the names of any months to be changed . The old intercalary month was abolished and replaced with a single intercalary day at the same point (i.e., five days before the end of February). January continued to be the first month of the year . </P> <P> The Romans later renamed months after Julius Caesar and Augustus, renaming Quintilis as "Iulius" (July) in 44 BC and Sextilis as "Augustus" (August) in 8 BC . Quintilis was renamed to honour Caesar because it was the month of his birth . According to a senatus consultum quoted by Macrobius, Sextilis was renamed to honour Augustus because several of the most significant events in his rise to power, culminating in the fall of Alexandria, occurred in that month . </P> <P> Other months were renamed by other emperors, but apparently none of the later changes survived their deaths . In AD 37, Caligula renamed September as "Germanicus" after his father; in AD 65, Nero renamed April as "Neroneus", May as "Claudius" and June as "Germanicus"; and in AD 84 Domitian renamed September as "Germanicus" and October as "Domitianus". Commodus was unique in renaming all twelve months after his own adopted names (January to December): "Amazonius", "Invictus", "Felix", "Pius", "Lucius", "Aelius", "Aurelius", "Commodus", "Augustus", "Herculeus", "Romanus", and "Exsuperatorius". The emperor Tacitus is said to have ordered that September, the month of his birth and accession, be renamed after him, but the story is doubtful since he did not become emperor before November 275 . Similar honorific month names were implemented in many of the provincial calendars that were aligned to the Julian calendar . </P>

When were july and august added to the calendar