registrationdate

Registrationdate refers to the date on which an entity, such as a user, customer, or device, first joined a system or service. In database schemas and APIs, it is typically stored as a timestamp marking when the record was created or when the user completed signup. The term may appear as registrationdate, registration_date, or created_at depending on naming conventions.

Data type and storage: This field is commonly a date or timestamp. If time is stored, it is often recorded in Coordinated Universal Time (UTC) to avoid timezone ambiguity; some systems use timezone-aware types. In SQL databases, possible types include DATE, DATETIME, TIMESTAMP (UTC), or TIMESTAMP WITH TIME ZONE. The value is usually immutable after creation.

Usage: Registrationdate enables tenure calculations, cohort analysis, and eligibility checks for features or promotions. It supports analytics for churn, renewal windows, and lifetime value. Efficient querying typically relies on indexing this column or including it in created_at indexes.

Validation and privacy: The value is typically required at account creation. Validation checks ensure a valid date and, if present, time. As a piece of personal data, it is subject to data protection laws; organizations may implement retention schedules and access controls.

Format and display: Internally stored in a standardized format (e.g., ISO 8601). When presenting to users, the date or timestamp may be localized and formatted according to locale. Naming conventions vary and integration with other systems may require mapping.

Variants and related terms: Related terms include created_at, joined_at, or signup_date. Differences across systems include whether only the date is stored or a full timestamp, and how time zone handling is implemented.