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Chikyu Earth地球

A line-drawn globe of the world's countries that turns at the Earth's own rate, with an optional realistic Earth from space and markers for any place.

Chikyu is the Japanese word 地球 for the Earth. About the name

Contents

Reference · The data door: hand the package your own maps of the Earth or orbit data as a source with its own licence and credit, and see whose data is on the screen

previousUtcDayfunction

The UTC day before ms.

Import it

import { previousUtcDay } from "@johnmorrisdotca/chikyu-earth/door";

Definition

function previousUtcDay(ms: number): string

Parameters

NameTypeDescription
msnumber

Milliseconds since the epoch.

Returns

string

The day before.

Examples

import { previousUtcDay } from "@johnmorrisdotca/chikyu-earth/door";

console.log(previousUtcDay(Date.UTC(2026, 5, 21, 12)));
2026-06-20

What it prints (run when this page was built)

View sourceEdit on GitHubMade from the source of @johnmorrisdotca/chikyu-earth 0.51.1.