content: name = "Gregorian"
  hours_in_day = 24
  minutes_in_hour = 60
  leap_year_rule = "(year % 4 == 0) and (year % 100 != 0) or (year % 400 == 0)"
  axial_tilt = 23.44
  solar_days_in_year = 365.25
  
  default_day = 1
  default_month = "January"
  default_year = 1970
  
  [months.january]
  name = "January"
  days = 31
  
  [months.february]
  name = "February"
  days = 28
  leap_year_days = 29
  
  [months.march]
  name = "March"
  days = 31
  
  [months.april]
  name = "April"
  days = 30
  
  [months.may]
  name = "May"
  days = 31
  
  [months.june]
  name = "June"
  days = 30
  
  [months.july]
  name = "July"
  days = 31
  
  [months.august]
  name = "August"
  days = 31
  
  [months.september]
  name = "September"
  days = 30
  
  [months.october]
  name = "October"
  days = 31
  
  [months.november]
  name = "November"
  days = 30
  
  [months.december]
  name = "December"
  days = 31
  
  [seasons.spring_equinox]
  name = "Spring Equinox"
  month = "March"
  day = 20
  
  [seasons.summer_solstice]
  name = "Summer Solstice"
  month = "June"
  day = 21
  
  [seasons.autumn_equinox]
  name = "Autumn Equinox"
  month = "September"
  day = 22
  
  [seasons.winter_solstice]
  name = "Winter Solstice"
  month = "December"
  day = 21
  
  [moons.luna]
  name = "Luna"
  period = "29.53"
  full_on = "1 January 2018"