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Returns a hash of values parsed from string according to the given format:

Date._strptime('2001-02-03', '%Y-%m-%d') # => {:year=>2001, :mon=>2, :mday=>3}

For other formats, see Formats for Dates and Times. (Unlike Date.strftime, does not support flags and width.)

See also strptime(3).

Related: Date.strptime (returns a Date object).

Returns a new Date object with values parsed from string, according to the given format:

Date.strptime('2001-02-03', '%Y-%m-%d')  # => #<Date: 2001-02-03>
Date.strptime('03-02-2001', '%d-%m-%Y')  # => #<Date: 2001-02-03>
Date.strptime('2001-034', '%Y-%j')       # => #<Date: 2001-02-03>
Date.strptime('2001-W05-6', '%G-W%V-%u') # => #<Date: 2001-02-03>
Date.strptime('2001 04 6', '%Y %U %w')   # => #<Date: 2001-02-03>
Date.strptime('2001 05 6', '%Y %W %u')   # => #<Date: 2001-02-03>
Date.strptime('sat3feb01', '%a%d%b%y')   # => #<Date: 2001-02-03>

For other formats, see Formats for Dates and Times. (Unlike Date.strftime, does not support flags and width.)

See argument start.

See also strptime(3).

Related: Date._strptime (returns a hash).

Returns the Julian start date for calendar reform; if not an infinity, the returned value is suitable for passing to Date#jd:

d = Date.new(2001, 2, 3, Date::ITALY)
s = d.start     # => 2299161.0
Date.jd(s).to_s # => "1582-10-15"

d = Date.new(2001, 2, 3, Date::ENGLAND)
s = d.start     # => 2361222.0
Date.jd(s).to_s # => "1752-09-14"

Date.new(2001, 2, 3, Date::GREGORIAN).start # => -Infinity
Date.new(2001, 2, 3, Date::JULIAN).start    # => Infinity

See argument start.

Calls the block with specified dates; returns self.

• The first date is self.

• Each successive date is date + step, where step is the numeric step size in days.

• The last date is the last one that is before or equal to limit, which should be a Date object.

Example:

limit = Date.new(2001, 12, 31)
Date.new(2001).step(limit){|date| p date.to_s if date.mday == 31 }

Output:

"2001-01-31"
"2001-03-31"
"2001-05-31"
"2001-07-31"
"2001-08-31"
"2001-10-31"
"2001-12-31"

Returns an Enumerator if no block is given.

Equivalent to step with arguments max and 1.

Equivalent to step with arguments min and -1.

Returns a string representation of the date in self in ISO 8601 extended date format ('%Y-%m-%d'):

Date.new(2001, 2, 3).to_s # => "2001-02-03"

Returns a string representation of the date in self, formatted according the given format:

Date.new(2001, 2, 3).strftime # => "2001-02-03"

For other formats, see Formats for Dates and Times.

Creates a DateTime object denoting the given ordinal date.

DateTime.ordinal(2001,34) #=> #<DateTime: 2001-02-03T00:00:00+00:00 ...>
DateTime.ordinal(2001,34,4,5,6,'+7')
                          #=> #<DateTime: 2001-02-03T04:05:06+07:00 ...>
DateTime.ordinal(2001,-332,-20,-55,-54,'+7')
                          #=> #<DateTime: 2001-02-03T04:05:06+07:00 ...>

Parses the given representation of date and time with the given template, and returns a hash of parsed elements. _strptime does not support specification of flags and width unlike strftime.

See also strptime(3) and strftime.

Parses the given representation of date and time with the given template, and creates a DateTime object. strptime does not support specification of flags and width unlike strftime.

DateTime.strptime('2001-02-03T04:05:06+07:00', '%Y-%m-%dT%H:%M:%S%z')
                          #=> #<DateTime: 2001-02-03T04:05:06+07:00 ...>
DateTime.strptime('03-02-2001 04:05:06 PM', '%d-%m-%Y %I:%M:%S %p')
                          #=> #<DateTime: 2001-02-03T16:05:06+00:00 ...>
DateTime.strptime('2001-W05-6T04:05:06+07:00', '%G-W%V-%uT%H:%M:%S%z')
                          #=> #<DateTime: 2001-02-03T04:05:06+07:00 ...>
DateTime.strptime('2001 04 6 04 05 06 +7', '%Y %U %w %H %M %S %z')
                          #=> #<DateTime: 2001-02-03T04:05:06+07:00 ...>
DateTime.strptime('2001 05 6 04 05 06 +7', '%Y %W %u %H %M %S %z')
                          #=> #<DateTime: 2001-02-03T04:05:06+07:00 ...>
DateTime.strptime('-1', '%s')
                          #=> #<DateTime: 1969-12-31T23:59:59+00:00 ...>
DateTime.strptime('-1000', '%Q')
                          #=> #<DateTime: 1969-12-31T23:59:59+00:00 ...>
DateTime.strptime('sat3feb014pm+7', '%a%d%b%y%H%p%z')
                          #=> #<DateTime: 2001-02-03T16:00:00+07:00 ...>

See also strptime(3) and strftime.

Returns a string in an ISO 8601 format. (This method doesn’t use the expanded representations.)

DateTime.new(2001,2,3,4,5,6,'-7').to_s
                         #=> "2001-02-03T04:05:06-07:00"

Returns a string representation of self, formatted according the given +format:

DateTime.now.strftime # => "2022-07-01T11:03:19-05:00"

For other formats, see Formats for Dates and Times:

Works similar to parse except that instead of using a heuristic to detect the format of the input string, you provide a second argument that describes the format of the string.

If a block is given, the year described in date is converted by the block. For example:

Time.strptime(...) {|y| y < 100 ? (y >= 69 ? y + 1900 : y + 2000) : y}

Below is a list of the formatting options:

%a

The abbreviated weekday name (“Sun”)

%A

The full weekday name (“Sunday”)

%b

The abbreviated month name (“Jan”)

%B

The full month name (“January”)

%c

The preferred local date and time representation

%C

Century (20 in 2009)

%d

Day of the month (01..31)

%D

Date (%m/%d/%y)

%e

Day of the month, blank-padded ( 1..31)

%F

Equivalent to %Y-%m-%d (the ISO 8601 date format)

%g

The last two digits of the commercial year

%G

The week-based year according to ISO-8601 (week 1 starts on Monday and includes January 4)

%h

Equivalent to %b

%H

Hour of the day, 24-hour clock (00..23)

%I

Hour of the day, 12-hour clock (01..12)

%j

Day of the year (001..366)

%k

hour, 24-hour clock, blank-padded ( 0..23)

%l

hour, 12-hour clock, blank-padded ( 0..12)

%L

Millisecond of the second (000..999)

%m

Month of the year (01..12)

%M

Minute of the hour (00..59)

%n

Newline (n)

%N

Fractional seconds digits

%p

Meridian indicator (“AM” or “PM”)

%P

Meridian indicator (“am” or “pm”)

%r

time, 12-hour (same as %I:%M:%S %p)

%R

time, 24-hour (%H:%M)

%s

Number of seconds since 1970-01-01 00:00:00 UTC.

%S

Second of the minute (00..60)

%t

Tab character (t)

%T

time, 24-hour (%H:%M:%S)

%u

Day of the week as a decimal, Monday being 1. (1..7)

%U

Week number of the current year, starting with the first Sunday as the first day of the first week (00..53)

%v

VMS date (%e-%b-%Y)

%V

Week number of year according to ISO 8601 (01..53)

%W

Week number of the current year, starting with the first Monday as the first day of the first week (00..53)

%w

Day of the week (Sunday is 0, 0..6)

%x

Preferred representation for the date alone, no time

%X

Preferred representation for the time alone, no date

%y

Year without a century (00..99)

%Y

Year which may include century, if provided

%z

Time zone as hour offset from UTC (e.g. +0900)

%Z

Time zone name

%%

Literal “%” character

%+

date(1) (%a %b %e %H:%M:%S %Z %Y)

require 'time'

Time.strptime("2000-10-31", "%Y-%m-%d") #=> 2000-10-31 00:00:00 -0500

You must require ‘time’ to use this method.

Returns the value of self as integer Epoch seconds; subseconds are truncated (not rounded):

Time.utc(1970, 1, 1, 0, 0, 0).to_i         # => 0
Time.utc(1970, 1, 1, 0, 0, 0, 999999).to_i # => 0
Time.utc(1950, 1, 1, 0, 0, 0).to_i         # => -631152000
Time.utc(1990, 1, 1, 0, 0, 0).to_i         # => 631152000

Related: Time#to_f Time#to_r.

Returns the value of self as a Float number Epoch seconds; subseconds are included.

The stored value of self is a Rational, which means that the returned value may be approximate:

Time.utc(1970, 1, 1, 0, 0, 0).to_f         # => 0.0
Time.utc(1970, 1, 1, 0, 0, 0, 999999).to_f # => 0.999999
Time.utc(1950, 1, 1, 0, 0, 0).to_f         # => -631152000.0
Time.utc(1990, 1, 1, 0, 0, 0).to_f         # => 631152000.0

Related: Time#to_i, Time#to_r.

Returns the value of self as a Rational exact number of Epoch seconds;

Time.now.to_r # => (16571402750320203/10000000)

Related: Time#to_f, Time#to_i.

Returns a string representation of self, without subseconds:

t = Time.new(2000, 12, 31, 23, 59, 59, 0.5)
t.to_s    # => "2000-12-31 23:59:59 +0000"

Related: Time#ctime, Time#inspect:

t.ctime   # => "Sun Dec 31 23:59:59 2000"
t.inspect # => "2000-12-31 23:59:59.5 +000001"

Returns a 10-element array of values representing self:

Time.utc(2000, 1, 1).to_a
# => [0,   0,   0,    1,   1,   2000, 6,    1,    false, "UTC"]
#    [sec, min, hour, day, mon, year, wday, yday, dst?,   zone]

The returned array is suitable for use as an argument to Time.utc or Time.local to create a new Time object.

Returns a new Time object whose numerical value is less than or equal to self with its seconds truncated to precision ndigits:

t = Time.utc(2010, 3, 30, 5, 43, 25.123456789r)
t           # => 2010-03-30 05:43:25.123456789 UTC
t.floor     # => 2010-03-30 05:43:25 UTC
t.floor(2)  # => 2010-03-30 05:43:25.12 UTC
t.floor(4)  # => 2010-03-30 05:43:25.1234 UTC
t.floor(6)  # => 2010-03-30 05:43:25.123456 UTC
t.floor(8)  # => 2010-03-30 05:43:25.12345678 UTC
t.floor(10) # => 2010-03-30 05:43:25.123456789 UTC

t = Time.utc(1999, 12, 31, 23, 59, 59)
t               # => 1999-12-31 23:59:59 UTC
(t + 0.4).floor # => 1999-12-31 23:59:59 UTC
(t + 0.9).floor # => 1999-12-31 23:59:59 UTC
(t + 1.4).floor # => 2000-01-01 00:00:00 UTC
(t + 1.9).floor # => 2000-01-01 00:00:00 UTC

Related: Time#ceil, Time#round.

Returns true if self is in daylight saving time, false otherwise:

t = Time.local(2000, 1, 1) # => 2000-01-01 00:00:00 -0600
t.zone                     # => "Central Standard Time"
t.dst?                     # => false
t = Time.local(2000, 7, 1) # => 2000-07-01 00:00:00 -0500
t.zone                     # => "Central Daylight Time"
t.dst?                     # => true

Returns true if self is in daylight saving time, false otherwise:

t = Time.local(2000, 1, 1) # => 2000-01-01 00:00:00 -0600
t.zone                     # => "Central Standard Time"
t.dst?                     # => false
t = Time.local(2000, 7, 1) # => 2000-07-01 00:00:00 -0500
t.zone                     # => "Central Daylight Time"
t.dst?                     # => true

Returns the offset in seconds between the timezones of UTC and self:

Time.utc(2000, 1, 1).utc_offset   # => 0
Time.local(2000, 1, 1).utc_offset # => -21600 # -6*3600, or minus six hours.

Returns a string representation of self, formatted according to the given string format. See Formats for Dates and Times.