Julian Day

[sparkz_alot]

Nicely done sparkz_alot! Have you tested the functions against some already calculated transforms to make checks?

darn you, j.crater :naughty: , thought I covered it all. Then after reading your post, thought maybe I'd better check some more. Sure enough ran into a problem with negative years. It appears Pythons calendar.monthrange only covers the positive years 1-9999, causing:

Error:
Please enter the 4 digit year (-4712 to 2100): -1000
Please enter the digit month (1 - 12): 7
Traceback (most recent call last):
  File "C:/Python/Astronomy/meeus/scratch.py", line 60, in <module>
    days_in_month = monthrange(my_year, my_month)
  File "C:\Python 3.5\lib\calendar.py", line 121, in monthrange
    day1 = weekday(year, month, 1)
  File "C:\Python 3.5\lib\calendar.py", line 113, in weekday
    return datetime.date(year, month, day).weekday()
ValueError: year is out of range

Process finished with exit code 1

Looks like I'll have to replace the calendar library with some other way to test the "day". Thanks for the catch  :D