Unix Timestamp (milliseconds)

datetime.epoch.unix_milliseconds

Milliseconds since epoch. Common in JavaScript (Date.now()), Java (System.currentTimeMillis()), and many APIs.

Domain

datetime

Try it

CLI

$ finetype infer -i "1705312200000"
→ datetime.epoch.unix_milliseconds

DuckDB

Detect

SELECT finetype('1705312200000');
-- → 'datetime.epoch.unix_milliseconds'

Cast expression

to_timestamp({col}::BIGINT / 1000)

Safe cast pipeline

-- Normalise and cast in one step
SELECT TRY_CAST(finetype_cast(my_column) AS TIMESTAMP) AS clean_value
FROM my_table
WHERE finetype(my_column) = 'datetime.epoch.unix_milliseconds';

JSON Schema

finetype schema datetime.epoch.unix_milliseconds

{
  "$id": "https://meridian.online/schemas/datetime.epoch.unix_milliseconds",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "description": "Milliseconds since epoch. Common in JavaScript (Date.now()), Java (System.currentTimeMillis()), and many APIs.",
  "examples": [
    "1705312200000",
    "1577836799999"
  ],
  "maxLength": 13,
  "minLength": 13,
  "pattern": "^\\d{13}$",
  "title": "Unix Timestamp (milliseconds)",
  "type": "string",
  "x-finetype-broad-type": "TIMESTAMP",
  "x-finetype-transform": "to_timestamp({col}::BIGINT / 1000)"
}

Examples

17053122000001577836799999

Aliases

unix_epoch_in_milliseconds