Intro
Simply periods that are commonly used in javascript:
- 100% constants - no API to learn
- Singular grammer (DAY not DAYS)
- Shorthand versions when commonly exists
const MS = 1
const SECOND = SEC = 1000 * MS
const MINUTE = MIN = 60 * SEC
const HOUR = HR = 60 * MIN
const DAY = 24 * HOUR
const WEEK = WK = 7 * DAY
const YEAR = YR = 365 * HOUR
const DECADE = DEC = 10 * YEAR
const CENTUARY = CEN = 100 * YEAR
const MILLENIUM = 100 * YEAR