Call a day a [i]perfect[/i] day if the sum of the digits of the month plus sum of the digits of the day equals the sum of digits of the year. For example, February $28$th, $2028$ is a perfect day because $2+2+8=2+0+2+8$. Find the number of perfect days in $2018$.

[i]2018 CCA Math Bonanza Team Round #5[/i]
1. First, we need to determine the sum of the digits of the year 2018:
   \[
   2 + 0 + 1 + 8 = 11
   \]
   Therefore, for a day to be perfect, the sum of the digits of the month plus the sum of the digits of the day must equal 11.

2. We will analyze each month to find the days that satisfy this condition.

3. **Month 1 (January):**
   - Sum of the digits of the month: \(1\)
   - We need the sum of the digits of the day to be \(11 - 1 = 10\).
   - Possible days: \(19\) (1+9=10) and \(28\) (2+8=10).
   - Total: 2 days.

4. **Month 2 (February):**
   - Sum of the digits of the month: \(2\)
   - We need the sum of the digits of the day to be \(11 - 2 = 9\).
   - Possible days: \(9\) (0+9=9), \(18\) (1+8=9), and \(27\) (2+7=9).
   - Note: February in 2018 does not have a 29th day.
   - Total: 3 days.

5. **Month 3 (March):**
   - Sum of the digits of the month: \(3\)
   - We need the sum of the digits of the day to be \(11 - 3 = 8\).
   - Possible days: \(8\) (0+8=8), \(17\) (1+7=8), and \(26\) (2+6=8).
   - Total: 3 days.

6. **Month 4 (April):**
   - Sum of the digits of the month: \(4\)
   - We need the sum of the digits of the day to be \(11 - 4 = 7\).
   - Possible days: \(7\) (0+7=7), \(16\) (1+6=7), and \(25\) (2+5=7).
   - Total: 3 days.

7. **Month 5 (May):**
   - Sum of the digits of the month: \(5\)
   - We need the sum of the digits of the day to be \(11 - 5 = 6\).
   - Possible days: \(6\) (0+6=6), \(15\) (1+5=6), and \(24\) (2+4=6).
   - Total: 3 days.

8. **Month 6 (June):**
   - Sum of the digits of the month: \(6\)
   - We need the sum of the digits of the day to be \(11 - 6 = 5\).
   - Possible days: \(5\) (0+5=5), \(14\) (1+4=5), and \(23\) (2+3=5).
   - Total: 3 days.

9. **Month 7 (July):**
   - Sum of the digits of the month: \(7\)
   - We need the sum of the digits of the day to be \(11 - 7 = 4\).
   - Possible days: \(4\) (0+4=4), \(13\) (1+3=4), and \(22\) (2+2=4).
   - Total: 3 days.

10. **Month 8 (August):**
    - Sum of the digits of the month: \(8\)
    - We need the sum of the digits of the day to be \(11 - 8 = 3\).
    - Possible days: \(3\) (0+3=3), \(12\) (1+2=3), \(21\) (2+1=3), and \(30\) (3+0=3).
    - Total: 4 days.

11. **Month 9 (September):**
    - Sum of the digits of the month: \(9\)
    - We need the sum of the digits of the day to be \(11 - 9 = 2\).
    - Possible days: \(2\) (0+2=2), \(11\) (1+1=2), and \(20\) (2+0=2).
    - Total: 3 days.

12. **Month 10 (October):**
    - Sum of the digits of the month: \(1 + 0 = 1\)
    - We need the sum of the digits of the day to be \(11 - 1 = 10\).
    - Possible days: \(19\) (1+9=10) and \(28\) (2+8=10).
    - Total: 2 days.

13. **Month 11 (November):**
    - Sum of the digits of the month: \(1 + 1 = 2\)
    - We need the sum of the digits of the day to be \(11 - 2 = 9\).
    - Possible days: \(9\) (0+9=9), \(18\) (1+8=9), and \(27\) (2+7=9).
    - Total: 3 days.

14. **Month 12 (December):**
    - Sum of the digits of the month: \(1 + 2 = 3\)
    - We need the sum of the digits of the day to be \(11 - 3 = 8\).
    - Possible days: \(8\) (0+8=8), \(17\) (1+7=8), and \(26\) (2+6=8).
    - Total: 3 days.

15. Summing up all the perfect days:
    \[
    2 + 3 + 3 + 3 + 3 + 3 + 3 + 4 + 3 + 2 + 3 + 3 = 36
    \]

The final answer is $\boxed{36}$