Calculate Vietnam lunar calendar (some different with Chinese lunar calendar)

Base on Algorithm: \Algorithm\How to compute the Vietnamese lunar calendar.pdf

HOW TO USE:

> python LunarSolar.py

0. Convert solar to lunar.
1. Convert lunar to solar

Select (0/1): 0

Enter date in dd/mm/yyyy format: 04/11/2017

Thứ 7 - 16/9/2017 AL; ngày: Ất Mùi - tháng: Bính Tuất - năm: Đinh Dậu

> python LunarSolar.py

0. Convert solar to lunar.
1. Convert lunar to solar

Select (0/1): 1

Enter date in dd/mm/yyyy format: 16/9/2017

Is leap month ? (0/1) - default 0: 0

Date 16/9/2017 in lunar calendar is Sat 4/11/2017 in solar calendar

Convert a lunar date to the corresponding solar date.

params:

        dd, mm, yy in lunar calendar
        : leap_month: 1 if leap month; 0 if not leap month
        : time_zone: default = 7 - Hanoi timezone

rtype : list with 3 elements

        0: dd : In solar calendar
        1: mm : In solar calendar
        2: yy : In solar calendar

Convert solar date dd/mm/yyyy to the corresponding lunar date

params:

   day, month, year in solar calendar ;
   time_zone with default = 7 (Ha Noi time zone)

rtype: list with 4 elements

        0: dd : In lunar calendar
        1: mm : In lunar calendar
        2: yy : In lunar calendar
        3: Is leap month: 1 --> leap month

Month in CAN-CHI name

Params

  : month of lunar calendar
  
  : year

rtype: str

Find day in CAN-CHI name

Params: day

  : month
  
  : year

rtype: str

'''Find year in CAN-CHI (zodiac) name'''

  find leap year

  params: yy - year

   rtype: 1 - leap year

          0 - not leap year

Get day in week by algrorithm: get julian day, get mod of julian day and 7

Params: 3 elements and 1 default element

        0: dd : In solar calendar
        
        1: mm : In solar calendar
        
        2: yy : In solar calendar
        
        3: viet_language: default = 1 return Vietnamese language
                        : other value return English language

rtype: Str