# now

(Not recommended; use datetime) Current date and time as serial date number

now is not recommended. To return the current date and time as a datetime value, use datetime instead. For more information on updating your code, see Version History or Replace Discouraged Instances of Serial Date Numbers and Date Strings.

## Description

example

t = now returns the current date and time as a serial date number. A serial date number represents the whole and fractional number of days starting from a fixed, preset date (January 0, 0000).

## Examples

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Change the output display for numbers to long, fixed-decimal format. Then return the current date and time as a serial date number.

format longG
t = now
t =
739294.931949611

The whole part of t corresponds to the date, and the fractional part corresponds to the time of day. One way to show the date and time is to convert t using the datetime function.

d = datetime(t,'ConvertFrom','datenum')
d = datetime
12-Feb-2024 22:22:00

To represent the date alone, without the time of day, use the floor function. Convert the result to a datetime value for display.

t2 = floor(t)
t2 =
739294

d2 = datetime(t2,'ConvertFrom','datenum')
d2 = datetime
12-Feb-2024

## Limitations

• MATLAB® Online™ returns the current date and time in Coordinated Universal Time (UTC) rather than local time.

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### January 0, 0000

Date specified to include a year 0 in the proleptic Gregorian calendar. For more information, see January 0 and Year zero.

## Tips

• To represent the current date and time as a serial date number, as text, or as a datetime value, use the function calls shown in the table.

Function Call

Output

floor(now)

Current date as a serial date number

rem(now,1)

Current time as a serial date number

datestr(now)

Current date and time as text

char(datetime)

string(datetime)

datetime

Current date and time as a datetime value

datetime(now,'ConvertFrom','datenum')

## Version History

Introduced before R2006a

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