On which dates of October, 1994 did Monday fall ?

Take 1 Oct 1994

$1+0+1+93+23+0=118$

$\frac{118}{7}$remainder is 16 Saturday

1 Oct 1994 – Saturday

2 Oct 1994 – Sunday

3 Oct 1994 –Monday

So Mondays 3, 10, 17, 24, 31