Invalid Date and Invalid time value in node js

**Browser:**
```
dayjs('23-03-2021', 'DD-MM-YYYY').toISOString() // "2021-03-22T21:00:00.000Z"
```

**node v15.11.0:**
```
dayjs('23-03-2021', 'DD-MM-YYYY').toISOString() // Error: Invalid time value
```

Start by reproducing the supplied dayjs parsing and toISOString() examples in a browser and Node v15.11.0, then compare the resulting behavior. Identify the cause of the Node-specific invalid time value and verify that the same input produces the intended ISO result in both environments.

Written by the indexing model from the issue text.