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several modifications before reaching its final form in 8 C.E.The Julian calendar
differs  from  the Gregorian only in the determination of leap years, lacking the
correction  for  years divisible by 100 and 400 in the Gregorian calendar. In the
Julian calendar, any  positive year  is  a leap year if divisible by 4. (Negative
years are leap years if the absolute value divided by 4 yields a remainder of 1.)
Days are considered to begin at midnight.

In the Julian calendar the average year has a  length of 365.25 days. compared to
the actual solar tropical year of 365.24219878 days.The calendar thus accumulates
one  day  of error with respect to the solar year every 128 years. Being a purely
solar  calendar, no  attempt  is  made to  synchronise the start of months to the
phases of the Moon.

    +-----------------------------------------------------------------------------------+
    |                                  July [2017 BE]                                   |
    +-----------+-----------+-----------+-----------+-----------+-----------+-----------+
    |    Sunday |    Monday |   Tuesday | Wednesday |  Thursday |    Friday |  Saturday |
    +-----------+-----------+-----------+-----------+-----------+-----------+-----------+
    |                                                           |         1 |         2 |
    +-----------+-----------+-----------+-----------+-----------+-----------+-----------+
    |         3 |         4 |         5 |         6 |         7 |         8 |         9 |