Dates & Times

The examples in this chapter assume 22 April 2026 at 12:00 UTC and US date display.

Keywords

Use built-in keywords to refer to common dates and times.

Notes Calculator

Calculation example
Calculation	Result
`today`	04/22/2026
`yesterday`	04/21/2026
`tomorrow`	04/23/2026
`now`	12:00

today, yesterday, and tomorrow resolve to a date. now resolves to the current time of day (displayed as HH:mm).

Date Formats

Notes Calculator accepts several date input formats.

ISO format (YYYY-MM-DD):

Notes Calculator

Calculation example
Calculation	Result
`2026-12-25`	12/25/2026

Slash format: US (MM/DD/YYYY) or European (DD/MM/YYYY), chosen by the date format setting. With the US order, a date whose first number is over 12 is read day first, so 22/04/2026 still works. Two-digit years work too.

Notes Calculator

Calculation example
Calculation	Result
`04/22/2026`	04/22/2026
`22/04/2026`	04/22/2026
`22/04/26`	04/22/2026

Long-form: month name, day, and optional year:

Notes Calculator

Calculation example
Calculation	Result
`April 22 2026`	04/22/2026
`Apr 22`	04/22/2026
`22 April 2026`	04/22/2026

Named Weekdays

Reference specific weekdays relative to today.

Notes Calculator

Calculation example
Calculation	Result
`next Monday`	04/27/2026
`last Friday`	04/17/2026
`Monday in 3 weeks`	05/18/2026

Date Arithmetic

Add or subtract days from a date. A bare number is treated as days.

Notes Calculator

Calculation example
Calculation	Result
`today + 7`	04/29/2026
`today + 3 days`	04/25/2026
`today + 2 weeks`	05/06/2026
`today - 1`	04/21/2026

Subtract two dates to get the time between them, in years, months, weeks and days. The result has a minus sign when the first date is the earlier one:

Notes Calculator

Calculation example
Calculation	Result
`2026-12-25 - today`	8 months 3 days
`Dec 25 2026 - Oct 14 2026`	2 months 1 week 4 days
`next Monday - today`	5 days
`2026-01-01 - 2026-03-01`	-2 months

Adding months to a date moves it by calendar months. When the day doesn’t exist in the new month, you get that month’s last day:

Notes Calculator

Calculation example
Calculation	Result
`2026-01-31 + 1 month`	02/28/2026

Add a time amount to a date:

Notes Calculator

Calculation example
Calculation	Result
`today + 3 hours`	04/22/2026
`now + 90 minutes`	13:30

Timezones

Append in <zone> to interpret a date or time in a specific timezone.

Notes Calculator

Calculation example
Calculation	Result
`now in Tokyo`	21:00
`today in UTC`	04/22/2026
`2026-04-22 in America/New_York`	04/22/2026

Supported formats:

City names, single or multi-word: Tokyo, London, Los Angeles, New York, Hong Kong, Buenos Aires, Ho Chi Minh City, Kuala Lumpur, and ~80 more.
Full IANA names: Asia/Tokyo, Europe/London, America/New_York.
US abbreviations: EST, EDT, CST, CDT, MST, MDT, PST, PDT, AKST, AKDT, HST.
Named US zones: eastern time, pacific time, central time, mountain time, atlantic time, hawaiian time.
Airport codes: LAX, JFK, LHR, CDG, NRT, SYD, HKG, and ~60 more.
GMT/UTC offsets: GMT, UTC, GMT+8, UTC-05:30.

When a zone’s calendar day differs from your local day, the result includes the date so the day shift is visible. At this chapter’s assumed time, Auckland is on the next day:

Notes Calculator

Calculation example
Calculation	Result
`now in Auckland`	04/23/2026 00:00

Query the current time in any zone:

Notes Calculator

Calculation example
Calculation	Result
`time in Tokyo`	21:00
`Tokyo time`	21:00
`date in Vancouver`	04/22/2026

Time difference between zones:

Notes Calculator

Calculation example
Calculation	Result
`time difference between Tokyo and New York`	13 hours
`difference between GMT+8 and EST`	13 hours

Durations

A single duration stays in the unit you wrote, and durations in one unit add up in that unit:

Notes Calculator

Calculation example
Calculation	Result
`90 min`	90 minutes
`25 hours`	25 hours
`1.5 hours + 1 hour`	2.50 hours

Adding durations in different units shows a breakdown. Writing them side by side works the same way:

Notes Calculator

Calculation example
Calculation	Result
`2 weeks + 1 day`	2 weeks 1 day
`1 h + 30 min`	1 hour 30 min
`2 weeks 3 days`	2 weeks 3 days

Subtracting starts the breakdown at the first unit, and dividing splits a duration into parts:

Notes Calculator

Calculation example
Calculation	Result
`2 weeks - 1 day`	1 week 6 days
`200 s - 1 min`	140 seconds
`100 hours / 3`	33 hours 20 min

Use in <unit> for a single unit, or a pair of neighbouring units such as in hours and minutes or in weeks and days for a breakdown:

Notes Calculator

Calculation example
Calculation	Result
`1 hour + 1 day in hours`	25 hours
`100 min in hours and minutes`	1 hour 40 min
`10 days in weeks and days`	1 week 3 days
`1 h 2 min 3 s in s`	3,723 seconds

Hover over any duration result to see the raw value in seconds.

Business days and work hours (5 weekdays, 5 business days, 8 work hours) are recognised but not supported yet: counting them needs your country’s public holidays, so for now these lines show nothing instead of a wrong number of days.

Months and years

A year is the length of the current calendar year: 365 days, or 366 in a leap year. A month you type as a duration, like 12 months, is a twelfth of that year. Dates use calendar months instead (see Date Arithmetic).

Notes Calculator

Calculation example
Calculation	Result
`1 year in days`	365 days
`12 months in years`	1 year

ISO 8601 & Unix Timestamps

ISO 8601 datetime (with required timezone):

Notes Calculator

Calculation example
Calculation	Result
`2026-04-22T10:15:00Z`	04/22/2026 10:15
`2026-04-22T10:15:00+01:00`	04/22/2026 09:15

Convert between dates and Unix timestamps:

Notes Calculator

Calculation example
Calculation	Result
`today to timestamp`	1776816000
`1745280000 to date`	04/22/2025
`current timestamp`	1776859200

Millisecond timestamps (≥ 10^11) are auto-detected:

Notes Calculator

Calculation example
Calculation	Result
`1745280000000 to date`	04/22/2025

Format a date as ISO 8601:

Notes Calculator

Calculation example
Calculation	Result
`today as iso`	2026-04-22T00:00:00.000+00:00
`2026-04-22T10:15:00Z as iso8601`	2026-04-22T10:15:00.000Z