# Day of the Year

[題目](https://leetcode.com/problems/day-of-the-year/)

{% embed url="<https://leetcode.com/problems/day-of-the-year/>" %}

Given a string `date` representing a [Gregorian calendar](https://en.wikipedia.org/wiki/Gregorian_calendar) date formatted as `YYYY-MM-DD`, return the day number of the year.

**Example 1:**

```
Input: date = "2019-01-09"
Output: 9
Explanation: Given date is the 9th day of the year in 2019.
```

**Example 2:**

```
Input: date = "2019-02-10"
Output: 41
```

**Example 3:**

```
Input: date = "2003-03-01"
Output: 60
```

**Example 4:**

```
Input: date = "2004-03-01"
Output: 61
```

**Constraints:**

* `date.length == 10`
* `date[4] == date[7] == '-'`, and all other `date[i]`'s are digits
* `date` represents a calendar date between Jan 1st, 1900 and Dec 31, 2019.

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