Fix/Standardize UTC Timestamp Format Using Day.js

[raylrui]

Context

We need to standardize timestamp displays across the application to show UTC time consistently. All timestamps should be displayed in the format "Aug 16, 2018 8:02 PM UTC" to avoid confusion with local time.

Current Problems

1. Some timestamps may be showing in UTC time
2. Lack of clear UTC timezone indicator
3. Potential confusion between UTC and local time

Proposed Solution

Implement a centralized timestamp formatting utility using Day.js that consistently displays UTC times in the specified format.