You are 31 when you become a billionth-seconds-old

Itchy ass, so I wrote a Python script to verify:

billion = 1000000000
sec_365 = 31536000 # (60 * 60 * 24 *365)
sec_366 = 31622400 # leap years
sec_day = 86400 # 1day = 86400seconds
sec_hour = 3600 # 1hour = 3600seconds
sec_min = 60
years = 0
days = 0
hours = 0
minutes = 0
seconds = 0

def billionConvertToTime(secs):
  global years
  global days
  global hours
  global minutes
  global seconds
  if secs < sec_min:
    seconds = secs
    return years, days, hours, minutes, seconds
  elif secs > sec_365:
    if years % 4 == 0: # leap years
      secs = secs - sec_366
      years += 1
      billionConvertToTime(secs)
    else:
      secs = secs - sec_365
      years += 1
      billionConvertToTime(secs)
  elif secs > sec_day:
    secs = secs - sec_day
    days += 1
    billionConvertToTime(secs)
  elif secs > sec_hour:
    secs = secs - sec_hour
    hours += 1
    billionConvertToTime(secs)
  elif secs > sec_min:
    secs = secs - sec_min
    minutes += 1
    billionConvertToTime(secs)

billionConvertToTime(billion)
print ("One billion seconds equals to %s years, %s days, %s hours, %s minutes and %s seconds" % (years, days, hours, minutes, seconds)) 

Output:
One billion seconds equals to 31 years, 251 days, 1 hours, 46 minutes and 40 seconds