Use date library as a library

Created by: mattclarke

Description of work

Removes the Date source from the code base and use conan instead

Issue

Closes #176 (closed)

Acceptance Criteria

Build still works. No code changes were made

Unit Tests

N/A

Other

N/A

---

Code Review (To be filled in by the reviewer only)

• Is the code of an acceptable quality?
• Do the changes function as described and is it robust?

---

Nominate for Group Code Review (Anyone can nominate it)

Indicate if you think the code should be reviewed in a Thursday code review session.

• Recommend for group code review

Also, nominate it on the code_review Slack channel (does someone want to automate this?).