Using the historical endpoint: ``` http://apilayer.net/api/historical?access_key=MY_KEY&source=GBP&date=2018-09-20 ``` always results in this error: ``` {"success":false,"error":{"code":302,"type":"invalid_date","info":"You have entered an invalid date. [Required format: date=YYYY-MM-DD]"}} ```
Using the historical endpoint:
always results in this error: