International Date Line
E69390
The International Date Line is an imaginary longitudinal line, roughly following the 180th meridian through the Pacific Ocean, where calendar dates change by one day when crossed.
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
geographical concept
→
imaginary line → line of longitude → |
| approximateLongitude |
180 degrees
→
|
| bendsAround |
Aleutian Islands
→
Fiji → Kiribati → New Zealand’s territories → |
| category |
geodesy
→
geography → timekeeping → |
| crosses |
Bering Sea
→
Pacific Ocean → Southern Ocean → |
| deviatesToAvoid |
landmasses
→
political borders → |
| deviatesToRespect |
national timekeeping preferences
→
|
| followsApproximately |
180th meridian
→
|
| governs |
direction-dependent date change
→
|
| hasEffect |
aligns civil dates with Earth’s rotation
→
date changes by one day when crossed → maintains global timekeeping consistency → |
| hasFunction |
calendar date change boundary
→
date demarcation → |
| hasNoSingleTreaty |
true
→
|
| isArbitraryConvention |
true
→
|
| isImaginary |
true
→
|
| isLegalBoundary |
false
→
|
| isOpposite |
Prime Meridian
→
|
| isPoliticalBoundary |
false
→
|
| isShownOn |
aviation charts
→
nautical charts → world maps → |
| isStandardizedBy |
international convention
→
|
| locatedIn |
Earth
→
Pacific Ocean → |
| referenceSystem |
Coordinated Universal Time
→
time zones → |
| relatedTo |
Coordinated Universal Time
→
Greenwich Mean Time → Prime Meridian → time zone boundaries → |
| ruleWhenCrossingEastward |
date goes back by one day
→
|
| ruleWhenCrossingWestward |
date advances by one day
→
|
| separates |
consecutive calendar dates
→
today and tomorrow → yesterday and today → |
| usedBy |
airlines
→
international travelers → navigators → shipping companies → |
Referenced by (9)
| Subject (surface form when different) | Predicate |
|---|---|
|
Big Diomede Island
→
Diomede Islands → Little Diomede Island → |
separatedBy |
|
Big Diomede Island
→
Near Islands → |
locatedNear |
|
Bering Strait
→
|
crossedBy |
|
Nadi–Vancouver
→
|
crossesFeature |
|
Big Diomede Island
→
|
locatedWestOf |
|
Pago Pago Harbor
→
|
near |