にちじ日時nichiji
1.

A specific combination of a day and a time used to indicate when an event will take place.

2.

The set of days and hours required for a particular activity, often used in planning or scheduling contexts.

Example:

あなたの都合のいい日時にミーティングを組み直してくださいませんか。

ひどけい日時計hidokei
1.

A device that indicates time through the position of a shadow cast by a gnomon, which is a raised structure, when it is illuminated by sunlight, typically mounted on a flat surface marked with hour divisions.

2.

A timekeeping instrument that determines the hour of the day based on the shadow's movement as sunlight interacts with a fixed object, typically used in outdoor settings.

3.

An ancient method of telling time which relies on the natural movement of the sun and its shadow, often represented by a calibrated disk or plate, where the markings correspond to various times of the day.

さくせいにちじ作成日時sakuseinichiji
1.

The specific point in time when a document, file, or piece of content was originally created or generated.

2.

The timestamp that indicates when an item was made, reflecting its chronological origin in a system.

3.

The moment associated with the initiation of a project or digital asset, often used for record-keeping and version control purposes.