1866 CE
Operational transatlantic telegraph cable
Information & communication · Technology · Infrastructure
After several failed attempts, the 1866 cable operationally connected Ireland and Newfoundland and reduced messages that had traveled for days by ship to minutes. It was costly, fragile infrastructure initially oriented toward states, news, and business, not universal or instantaneous communication for everyone.
Precision, calendar, and review
- Start
- year · no uncertainty qualifier in this record
- Calendar and convention
- Historical-era years; the source calendar is not identified. No conversion of days is assumed.
- Year zero
- The scale goes from 1 BCE to 1 CE without year zero. Changing era names changes labels only.
- Documentary review
- Date not recorded
Reading the date: point event.
Sources
- americanhistory.si.edu (opens in a new tab)
Source provenance and scope
- Publication date
- Pending verification: the source could not be accessed
- Bibliographic date checked
- 2026-09-23
The correspondence between this reference and individual claims has not yet been itemized.
This record is an editorial synthesis. Consult the sources to check claims and their limits. Chronological relationships alone do not establish causation.