# Date & Time Validator Validate date and time formats including ISO8601, custom formats, leap year, and month/day validation > Canonical page: https://elysiatools.com/en/tools/date-time-validator - **Category:** Validation - **Keywords:** date, time, validator, datetime, iso8601, format, leap year, timestamp ## Overview The Date & Time Validator is a utility tool that checks the validity of date and time strings against various formats, including ISO8601, Unix timestamps, and RFC2822. It performs leap year and month/day validation to ensure accuracy. ## Inputs - **Date/Time** (text): Enter date/time (e.g., 2024-01-15T10:30:00Z)... - **Format** (select) ## When to use - When verifying user input for date or time fields in forms or applications. - During data processing to validate timestamps in logs, APIs, or datasets. - When debugging code that handles date and time data to identify formatting errors. ## How it works - Enter the date or time string in the input field. - Select the desired format from the dropdown menu, such as ISO8601 or auto-detect. - The tool validates the input against the selected format and checks for leap year and month/day validity. - A text result indicates whether the input is valid or highlights any errors. ## Use cases - Validating timestamp data from APIs or system logs to ensure correct formatting. - Checking date entries in web forms or databases to prevent invalid submissions. - Verifying date formats in CSV files before importing into analytics tools. ## Frequently asked questions ### What formats does the tool support? It supports ISO8601, date-only, time-only, Unix timestamps, and RFC2822 formats. ### How does leap year validation work? The tool automatically checks if dates like February 29 are valid for leap years. ### Can I validate multiple dates simultaneously? No, the tool validates one date or time string per use. ### What is the auto-detect format option? It attempts to identify the format of the input string based on common patterns. ### Is there a limit on input length? The tool accepts standard date/time strings, but extremely long or malformed inputs may not process correctly. ## Related tools - [UUID Validator](https://elysiatools.com/en/tools/uuid-validator): Validate UUID format, detect version, and analyze UUID structure including variant, timestamp, and node information - [Batch Email Validator](https://elysiatools.com/en/tools/batch-email-validator): Validate multiple email addresses at once with format checking and basic quality analysis - [Batch Phone Validator](https://elysiatools.com/en/tools/batch-phone-validator): Validate and format multiple phone numbers at once with international format support - [Global Phone Validator](https://elysiatools.com/en/tools/global-phone-validator): Validate phone numbers from multiple countries including China, US, and more with detailed formatting and carrier info - [ISBN Validator](https://elysiatools.com/en/tools/isbn-validator): Validate ISBN-10 and ISBN-13 book number formats with checksum verification - [JSON Schema Validator](https://elysiatools.com/en/tools/json-schema-validator): Validate JSON data against a JSON Schema to verify structure and data types - [License Plate Validator](https://elysiatools.com/en/tools/license-plate-validator): Validate license plate formats from multiple countries including China, USA, Japan, and more - [Phone Validator](https://elysiatools.com/en/tools/phone-validator): Validate and format phone numbers internationally ## Samples - [Date & Time Samples](https://elysiatools.com/en/samples/date-time): Collection of date and time strings in various formats for validation testing - [Web Date & Time Rust Samples](https://elysiatools.com/en/samples/web-datetime-rust): Web Rust date and time handling examples including getting current time, formatting, and parsing - [Android Date & Time Java Samples](https://elysiatools.com/en/samples/android-datetime-java): Android Java date and time examples including getting current time, formatting dates, and parsing date strings - [Android Date & Time Kotlin Samples](https://elysiatools.com/en/samples/android-datetime-kotlin): Android Kotlin date and time examples including getting current time, formatting dates, and parsing date strings ## Related content - [Date and Time Normalization and Deadline Calculation](https://elysiatools.com/en/hubs/date-time-scheduling): Turn ambiguous or mixed-format date inputs into validated, timezone-aware, business-ready timestamps, deadlines, and duration facts.