freeCodeCamp project: Timestamp microservice User stories: 1) I can pass a string as a parameter, and it will check to see whether that string contains either a unix timestamp or a natural language date (example: January 1, 2016) 2) If it does, it returns both the Unix timestamp and the natural language form of that date. 3) If it does not contain a date or Unix timestamp, it returns null for those properties.