In [1]:

```
from IPython.display import YouTubeVideo
YouTubeVideo('pdMUk16675U')
```

Out[1]:

In [2]:

```
def calculate_day(month,day):
if month==1: shift=0
elif month==2: shift=3
elif month==3: shift=3
elif month==4: shift=6
elif month==5: shift=1
elif month==6: shift=4
elif month==7: shift=6
elif month==8: shift=2
elif month==9: shift=5
elif month==10: shift=0
elif month==11: shift=3
elif month==12: shift=5
else: return "ERROR"
mytotal = day + shift
remainder = mytotal % 7
if remainder==0: return "Monday"
elif remainder==1: return "Tuesday"
elif remainder==2: return "Wednesday"
elif remainder==3: return "Thursday"
elif remainder==4: return "Friday"
elif remainder==5: return "Saturday"
elif remainder==6: return "Sunday"
else: return "ERROR"
```

In [3]:

```
calculate_day(6,15)
```

Out[3]:

In [4]:

```
from __future__ import print_function
from ipywidgets import interact, interactive, fixed, interact_manual
import ipywidgets as widgets
interact(calculate_day, month=widgets.IntSlider(min=1, max=12, step=1, value=6), day=widgets.IntSlider(min=1, max=31, step=1, value=15))
```

Out[4]: