Windows PowerShell command on Get-command clock

Manual Pages for UNIX Operating System command usage for man clock

Tcl Built-In Commands clock(1T)

_________________________________________________________________

NAME

clock - Obtain and manipulate time

SYNOPSIS

clock option ?arg arg ...?

_________________________________________________________________

DESCRIPTION

This command performs one of several operations that may obtain or manipulate strings or values that represent some notion of time. The option argument determines what action is carried out by the command. The legal options (which may be abbreviated) are: |

clock clicks ?-milliseconds? ||

Return a high-resolution time value as a system- |

dependent integer value. The unit of the value is |

system-dependent but should be the highest resolution |

clock available on the system such as a CPU cycle |

counter. If -milliseconds is specified, then the value |

is guaranteed to be of millisecond granularity. This | value should only be used for the relative measurement | of elapsed time.

clock format clockValue ?-format string? ?-gmt boolean?

Converts an integer time value, typically returned by

clock seconds, clock scan, or the atime or mtime

options of the file command, to human-readable form.

If the -format argument is present the next argument is

a string that describes how the date and time are to be

formatted. Field descriptors consist of a % followed

by a field descriptor character. All other characters are copied into the result. Valid field descriptors are:

%% Insert a %.

%a Abbreviated weekday name (Mon, Tue, etc.).

%A Full weekday name (Monday, Tuesday, etc.).

%b Abbreviated month name (Jan, Feb, etc.).

%B Full month name. |

%c ||

Locale specific date and time. The format for | date and time in the default "C" locale on |

Unix/Mac is "%a %b %d %H:%M:%S %Y". On Windows, |

Tcl Last change: 8.4 1

Tcl Built-In Commands clock(1T)

this value is the locale specific long date and | time, as specified in the Regional Options control | panel settings. |

%C ||

First two digits of the four-digit year (19 or |

20).

%d Day of month (01 - 31). |

%D ||

Date as %m/%d/%y. |

%e ||

Day of month (1 - 31), no leading zeros. |

%g ||

The ISO8601 year number corresponding to the |

ISO8601 week (%V), expressed as a two-digit year- |

of-the-century, with leading zero if necessary. |

%G ||

The ISO8601 year number corresponding to the |

ISO8601 week (%V), expressed as a four-digit |

number. |

%h ||

Abbreviated month name.

%H Hour in 24-hour format (00 - 23). |

%I ||

Hour in 12-hour format (01 - 12).

%j Day of year (001 - 366). |

%k ||

Hour in 24-hour format, without leading zeros (0 - |

23). |

%l ||

Hour in 12-hour format, without leading zeros (1 - |

12).

%m Month number (01 - 12).

%M Minute (00 - 59). |

%n ||

Insert a newline.

%p AM/PM indicator. |

Tcl Last change: 8.4 2

Tcl Built-In Commands clock(1T)

%r ||

Time in a locale-specific "meridian" format. The |

"meridian" format in the default "C" locale is |

"%I:%M:%S %p". |

%R ||

Time as %H:%M. |

%s ||

Count of seconds since the epoch, expressed as a | decimal integer.

%S Seconds (00 - 59). |

%t ||

Insert a tab. |

%T ||

Time as %H:%M:%S. |

%u ||

Weekday number (Monday = 1, Sunday = 7).

%U Week of year (00 - 52), Sunday is the first day of

the week. |

%V ||

Week of year according to ISO-8601 rules. Week 1 |

of a given year is the week containing 4 January. |

%w ||

Weekday number (Sunday = 0, Saturday = 6).

%W Week of year (00 - 52), Monday is the first day of

the week. |

%x ||

Locale specific date format. The format for a |

date in the default "C" locale for Unix/Mac is |

"%m/%d/%y". On Windows, this value is the locale |

specific short date format, as specified in the | Regional Options control panel settings. |

%X ||

Locale specific 24-hour time format. The format |

for a 24-hour time in the default "C" locale for |

Unix/Mac is "%H:%M:%S". On Windows, this value is |

the locale specific time format, as specified in | the Regional Options control panel settings.

%y Year without century (00 - 99).

Tcl Last change: 8.4 3

Tcl Built-In Commands clock(1T)

%Y Year with century (e.g. 1990)

%Z Time zone name.

If the -format argument is not specified, the format |

string "%a %b %d %H:%M:%S %Z %Y" is used. If the -gmt

argument is present the next argument must be a boolean which if true specifies that the time will be formatted as Greenwich Mean Time. If false then the local timezone will be used as defined by the operating environment.

clock scan dateString ?-base clockVal? ?-gmt boolean?

Convert dateString to an integer clock value (see clock

seconds). This command can parse and convert virtually any standard date and/or time string, which can include

standard time zone mnemonics. If only a time is speci-

fied, the current date is assumed. If the string does not contain a time zone mnemonic, the local time zone

is assumed, unless the -gmt argument is true, in which

case the clock value is calculated assuming that the

specified time is relative to Greenwich Mean Time. -

gmt, if specified, affects only the computed time

value; it does not impact the interpretation of -base.

If the -base flag is specified, the next argument

should contain an integer clock value. Only the date

in this value is used, not the time. This is useful for determining the time on a specific day or doing

other date-relative conversions.

The dateString consists of zero or more specifications of the following form: time A time of day, which is of the form: hh?:mm?:ss?? ?meridian? ?zone? or hhmm ?meridian? ?zone?. If no

meridian is specified, hh is interpreted on a 24-

hour clock.

date A specific month and day with optional year. The acceptable formats are mm/dd?/yy?, monthname dd ?, yy?, dd monthname ?yy?, day, dd monthname yy,

?CC?yymmdd, ?CC?yy-mm-dd, dd-monthname-?CC?yy.

The default year is the current year. If the year

is less than 100, we treat the years 00-68 as |

2000-2068 and the years 69-99 as 1969-1999. Not |

all platforms can represent the years 38-70, so an |

error may result if these years are used.

ISO 8601 point-in-time

An ISO 8601 point-in-time specification, such as

CCyymmddThhmmss, where T is the literal T, Tcl Last change: 8.4 4

Tcl Built-In Commands clock(1T)

CCyymmdd hhmmss, or CCyymmddThh:mm:ss. Note that

only these three formats are accepted. The com-

mand does not accept the full range of point-in-

time specifications specified in ISO8601. Other formats can be recognized by using commands such as regexp to extract their fields and reorganize

them into a form accepted by the clock scan com-

mand. relative time A specification relative to the current time. The format is number unit acceptable units are year, fortnight, month, week, day, hour, minute (or

min), and second (or sec). The unit can be speci-

fied as a singular or plural, as in 3 weeks. These modifiers may also be specified: tomorrow, yesterday, today, now, last, this, next, ago.

The actual date is calculated according to the follow-

ing steps. First, any absolute date and/or time is processed and converted. Using that time as the base,

day-of-week specifications are added. Next, relative

specifications are used. If a date or day is speci-

fied, and no absolute or relative time is given, mid-

night is used. Finally, a correction is applied so that the correct hour of the day is produced after allowing for daylight savings time differences and the correct date is given when going from the end of a long month to a short month. Daylight savings time correction is applied only when the relative time is specified in units of days or more, ie, days, weeks, fortnights, months or years. This means that when crossing the daylight savings time

boundary, different results will be given for clock

scan "1 day" and clock scan "24 hours":

% clock scan "1 day" -base [clock scan 1999-10-31]

941443200

% clock scan "24 hours" -base [clock scan 1999-10-31]

941439600

clock seconds

Return the current date and time as a system-dependent

integer value. The unit of the value is seconds, allowing it to be used for relative time calculations. The value is usually defined as total elapsed time from an ``epoch''. You shouldn't assume the value of the epoch.

Tcl Built-In Commands clock(1T)

KEYWORDS

clock, date, time

ATTRIBUTES

See attributes(5) for descriptions of the following attri-

butes:

_______________________________________

| ATTRIBUTE TYPE | ATTRIBUTE VALUE|

|____________________|__________________|_

| Availability | runtime/tcl-8 |

|____________________|__________________|_

| Interface Stability| Uncommitted |

|____________________|_________________|

NOTES Source for Tcl is available on http://opensolaris.org. Tcl Last change: 8.4 6

Manual Pages for UNIX Operating System command usage for man clock

Tcl Built-In Commands clock(1T)

NAME

clock - Obtain and manipulate time

SYNOPSIS

clock option ?arg arg ...?

DESCRIPTION

clock clicks ?-milliseconds? ||

clock available on the system such as a CPU cycle |

clock format clockValue ?-format string? ?-gmt boolean?

clock seconds, clock scan, or the atime or mtime

Tcl Built-In Commands clock(1T)

Tcl Built-In Commands clock(1T)

Tcl Built-In Commands clock(1T)

clock scan dateString ?-base clockVal? ?-gmt boolean?

Convert dateString to an integer clock value (see clock

case the clock value is calculated assuming that the

should contain an integer clock value. Only the date

hour clock.

Tcl Built-In Commands clock(1T)

them into a form accepted by the clock scan com-

boundary, different results will be given for clock

scan "1 day" and clock scan "24 hours":

% clock scan "1 day" -base [clock scan 1999-10-31]

% clock scan "24 hours" -base [clock scan 1999-10-31]

clock seconds

SEE ALSO

Tcl Built-In Commands clock(1T)

clock, date, time

ATTRIBUTES

| ATTRIBUTE TYPE | ATTRIBUTE VALUE|