Phases de la lune

cycle_lunaire = 29.53058853
delta = cycle_lunaire / 8
phases = "Nouvelle lune","Premier croissant","Premier quartier", "Gibbeuse croissante","Pleine lune","Gibbeuse décroissante","Dernier quartier","Dernier croissant"
visuel = ['🌑','🌒','🌓','🌔','🌕','🌖','🌗','🌘']

def phase_lune(nb_jours):
 nb_cycles = int(nb_jours / cycle_lunaire)
 reste = nb_jours - nb_cycles * cycle_lunaire
 tranche = int(round(reste / delta, 0) % 8)
 return phases[tranche], visuel[tranche]

>>> phase_lune(365)
('Gibbeuse croissante', '🌔')

Calendrier chinois – signes du zodiaque

def zodiaque_chinois(annee):
 elements = "Bois", "Feu", "Terre", "Métal", "Eau"
 aspects = "Yang", "Yin"
 signes_zodiaque = (
        "Rat", "Buffle", "Tigre", "Lapin", "Dragon", "Serpent",
        "Cheval", "Chèvre", "Singe", "Coq", "Chien", "Cochon"
    )
 annee_ref = 1924 # Année du Rat, début d'un cycle de 60 ans
 diff_annees = annee - annee_ref
 ind_signe_zodiaque = diff_annees % 12
 ind_aspect = diff_annees % 2
 ind_element = (diff_annees % 10) // 2
 signe_zodiaque = signes_zodiaque[ind_signe_zodiaque]
 aspect = aspects[ind_aspect]
 element = elements[ind_element]
 annee_chinoise = annee_ref + (diff_annees % 60)
 return f"{annee_chinoise} : {signe_zodiaque} ({element} {aspect})"
 
>>> zodiaque_chinois(2024)
1964 : Dragon (Bois Yang)

Comparaison JULIEn | GREGORIEN | Personnel

def bissextile_julien(annee):
 return annee % 4 == 0
 
def bissextile_gregorien(annee):
 return (annee % 4 == 0 and annee % 100 != 0) or (annee % 400 == 0)
 
def bissextile_perso(annee):
 return annee % 4 == 0 and annee % 128 != 0
 
def compare(ans, methode):
 total = 0
 for an in range(ans):
  total += 365
  if methode(an): total += 1
 return total - 365.2421904482 * ans

>>> compare(10000, bissextile_julien)
78.09551799995825

>>> compare(10000, bissextile_gregorien)
3.095517999958247

>>> compare(10000, bissextile_perso)
-0.904482000041753