# Scientific Computing with Python Projects - Time Calculator - Xt0P957q8wR_sdQwZoskZ

Tell us what’s happening:

It passed the test but there is certainly something wrong. I could not figure out how to correct it. I have already planned to redo the whole thing later after I have some rest. Before I completely abandon this version, I want to see if someone else can help.

`print(add_time("11:06 PM", "12:00", "Tuesday"))`
11:06 AM, Wednesday (next day)
`print(add_time("11:06 PM", "13:00", "Tuesday"))`
12:06 AM, Thursday (2 days later)

the mistake would carry on until

`print(add_time("11:06 PM", "23:00", "Tuesday"))`
10:06 AM, Thursday (2 days later)
`print(add_time("11:06 PM", "24:00", "Tuesday"))`
11:06 PM, Wednesday (next day)

https://replit.com/@StephenChan1/freeCodeCampSCPtime-calculator#time_calculator.py

``````def add_time(start, duration, start_day=""):
# chopping up input for calculations
a = start.split()
start_time, AMPM = a[0], a[1]
b = start_time.split(":")
start_hr, start_min = int(b[0]), int(b[1])
c = duration.split(":")
dura_hr, dura_min = int(c[0]), int(c[1])

# setting up variable for return
new_min = 0
co_hr = 0 # for minute carry over to hour
new_hr = 0
new_day = 0
new_AMPM = ""
new_weekday = ""
days_later = ""
# minutes, carry over to hours at 60
minutes = start_min + dura_min
if minutes <= 59:
new_min = minutes
else:
new_min = minutes % 60
co_hr += 1

# hours, carry over to days
hours = start_hr + dura_hr + co_hr
if hours <= 11:
new_hr = hours
new_AMPM = AMPM
elif hours % 12 == 0:
new_hr = 12 # return 12:xx instead of 0
new_day += (hours // 24)
if AMPM == "AM":
new_AMPM = "PM"
else:
new_AMPM = "AM"
new_day += 1
else:
new_hr = hours % 12
new_day += hours // 24
if dura_hr % 24 == 0:
new_AMPM = AMPM
else:
if AMPM == "AM":
new_AMPM = "PM"
else:
new_AMPM = "AM"
new_day += 1

# n days later
if new_day == 1:
days_later = " (next day)"
elif new_day >= 2:
days_later = f" ({new_day} days later)"

# weekday
weekday = [", Monday", ", Tuesday", ", Wednesday",
", Thursday", ", Friday", ", Saturday", ", Sunday"]
if start_day:
weekday_lower = list(map(lambda x: x.lower().strip(", "), weekday))
start_day_idx = weekday_lower.index(start_day.lower())
if new_day == 0:
new_weekday = weekday[start_day_idx]
else:
new_day_idx = (start_day_idx + new_day) % 7
new_weekday = weekday[new_day_idx]

new_min = str(new_min).zfill(2) # zero padding minutes

new_time = f"{new_hr}:{new_min} {new_AMPM}{new_weekday}{days_later}"
return new_time
``````

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