Documentation

now

Current date and time as serial date number

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 =
737663.461093839

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
26-Aug-2019 11:03:58

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 =
737663

d2 = datetime(t2,'ConvertFrom','datenum')
d2 = datetime
26-Aug-2019 00:00:00

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('now'))

string(datetime('now'))

datetime('now')

Current date and time as a datetime value

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