Date to Timestamp Converter
Convert readable dates to Unix timestamps instantly—encode dates for APIs, databases, and time-based queries. Transform any date/time to epoch seconds for programming and data storage.
Why Use Date to Timestamp Converter
Programming with dates requires Unix timestamps: API parameters expect epoch seconds, database queries filter by timestamp ranges, scheduled tasks trigger at specific Unix times. Manually calculating seconds since 1970 is impossible. This converter transforms human-readable dates into Unix timestamps: enter "January 15, 2024 3:00 PM EST", get 1705345200. Essential for building API requests (filtering data by date range), writing database queries (WHERE timestamp > X), or scheduling cron jobs (calculating next run time in epoch seconds).
- Any date format: Enter dates naturally (Jan 15, 2024 or 2024-01-15)
- Timezone support: Convert from local time or specify timezone
- Both outputs: Generates seconds and milliseconds timestamps
- Date picker: Visual calendar for selecting dates
- Current time: Get current Unix timestamp instantly
Step-by-Step Tutorial
- Enter date: "January 15, 2024" or use date picker
- Add time: 15:30:00 (3:30 PM)
- Select timezone: EST (UTC-5)
- Click "Convert to Timestamp"
- Get Unix timestamp: 1705345800 (seconds)
- Also shows: 1705345800000 (milliseconds for JavaScript)
- Copy timestamp for API request or database query
Real-World Use Case
A data analyst needs website analytics for Q4 2023 (October 1 - December 31). Analytics API requires Unix timestamp range parameters. Converting: October 1, 2023 00:00 UTC = 1696118400 (start), January 1, 2024 00:00 UTC = 1704067200 (end). API request: GET /analytics?start=1696118400&end=1704067200 returns Q4 data. Without converter, calculating timestamps manually: count days from 1970 (19,631 days × 86,400 seconds + timezone offset)—error-prone. Date picker prevents typos (Oct 1 vs Oct 10 mistake impossible). Timezone selector avoids offset errors. Converter eliminates manual timestamp calculation, ensuring accurate date range queries every time.
Best Practices
- Always specify timezone to avoid ambiguity (midnight EST ≠ midnight UTC)
- Use UTC for stored timestamps, convert to local for display only
- For date ranges: use start of day 00:00:00 and end 23:59:59
- Verify milliseconds vs seconds based on target system (API docs)
- Test timestamp by converting back to date before using
Performance & Limits
- Date range: 1970 to 2038 (32-bit), unlimited (64-bit systems)
- Input formats: ISO 8601, US (MM/DD/YYYY), EU (DD/MM/YYYY), natural language
- Timezone database: All IANA timezones supported
- Output precision: Second and millisecond timestamps
- Batch mode: Convert multiple dates to timestamps
Common Mistakes to Avoid
- Forgetting timezone: "Jan 1, 2024" ambiguous—specify UTC or local
- Wrong date format: 01/02/2024 = Feb 1 (US) or Jan 2 (EU)
- Off-by-one errors: End of day is 23:59:59, not 00:00:00 next day
- Daylight saving: Be aware of DST transitions affecting timestamps
Privacy and Data Handling
Date to timestamp conversion happens entirely in your browser using JavaScript—no data transmitted. Dates processed locally and instantly. Safe for converting confidential dates or project deadlines.
Frequently Asked Questions
How do I convert a specific date and time to Unix timestamp?
Enter full date with time: "2024-01-15 15:30:00" and specify timezone. Format options: ISO 8601 (2024-01-15T15:30:00Z for UTC), US format (01/15/2024 3:30 PM EST), EU format (15/01/2024 15:30 GMT). Using date picker prevents format confusion. Time components: hour (24-hour or 12-hour with AM/PM), minute, second. Omitting time defaults to 00:00:00 (midnight). Timezone critical: "3:30 PM EST" ≠ "3:30 PM PST" (3-hour difference). For unambiguous timestamps: use UTC or include timezone explicitly. Many converters accept natural language: "tomorrow at 3pm", "next Monday 9am" (interprets in your local timezone).
What timezone should I use when converting dates to timestamps?
Best practice: use UTC for storage, convert to local timezone only for display. Reasoning: (1) UTC has no DST transitions (no ambiguous times), (2) Globally consistent (no regional differences), (3) Simplifies math (adding days doesn't depend on timezone rules). For user-facing features: convert user's local time to UTC timestamp before storing. For API requests: check documentation—most APIs expect UTC unless specified. For database queries: store UTC timestamps, apply timezone conversion in application layer. Exception: scheduling based on local events ("run at 9am NY time daily" requires local timezone awareness). For date ranges: convert both start/end in same timezone to avoid subtle bugs.
How do I convert dates from different timezones?
Specify source timezone during conversion. Example: "Jan 15, 2024 3:00 PM EST" → converter applies UTC-5 offset → returns correct UTC timestamp. For multiple timezones in same dataset: convert each date with its timezone, get UTC timestamps, then compare. Common scenario: coordinating across offices (NY meeting at 3pm EST, what time in Tokyo?). Workflow: (1) Convert "3pm EST Jan 15" to timestamp, (2) Convert timestamp back to JST, shows "5am JST Jan 16". Timestamps as intermediary eliminate timezone math errors. Pitfall: DST changes—"3pm EST" in January (UTC-5) vs July (UTC-4). Modern converters handle DST automatically using timezone database.
Can I convert dates before 1970 to Unix timestamp?
Yes, using negative timestamps. Unix epoch = Jan 1, 1970 00:00:00 UTC. Dates before = negative seconds. Example: December 31, 1969 23:00:00 UTC = -3600 (1 hour before epoch). Historical dates fully supported: Jan 1, 1950 = -631152000. 32-bit systems limit: Dec 13, 1901 to Jan 19, 2038. 64-bit systems: essentially unlimited (±292 billion years). Use case: historical data analysis, birthdates, genealogy research. Caveat: some older APIs/databases don't handle negative timestamps—test compatibility. For very old dates (before 1900), consider alternative representations (ISO 8601 strings) as timestamp arithmetic becomes unwieldy and precision questionable.