method
gregorian_leap?
v1_9_2_180 -
Show latest stable
- Class:
Date
gregorian_leap?(y)public
Is a year a leap year in the Gregorian calendar?
All years divisible by 4 are leap years in the Gregorian calendar, except for years divisible by 100 and not by 400.
- %
- *
- **
- +
- +@
- -
- -@
- /
- <<
- <=>
- ==
- ===
- >>
- _valid_civil?
- _valid_commercial?
- _valid_jd?
- _valid_nth_kday?
- _valid_ordinal?
- _valid_time?
- _valid_weeknum?
- abs
- ajd
- ajd_to_amjd
- ajd_to_jd
- amjd
- amjd_to_ajd
- asctime
- ceil
- civil_to_jd
- coerce
- commercial_to_jd
- ctime
- cwday
- cweek
- cwyear
- day
- day_fraction
- day_fraction_to_time
- div
- divmod
- downto
- england
- eql?
- find_fdom
- find_fdoy
- find_ldom
- find_ldoy
- floor
- gregorian
- gregorian?
- hash
- hour
- httpdate
- inspect
- integer?
- iso8601
- italy
- jd
- jd_to_ajd
- jd_to_civil
- jd_to_commercial
- jd_to_ld
- jd_to_mjd
- jd_to_nth_kday
- jd_to_ordinal
- jd_to_wday
- jd_to_weeknum
- jisx0301
- julian
- julian?
- ld
- ld_to_jd
- leap?
- marshal_dump
- marshal_load
- mday
- min
- minute
- mjd
- mjd_to_jd
- modulo
- mon
- month
- new_offset
- new_start
- next
- next_day
- next_month
- next_year
- nth_kday_to_jd
- offset
- ordinal_to_jd
- prev_day
- prev_month
- prev_year
- quo
- quotient
- quotrem
- remainder
- rfc2822
- rfc3339
- rfc822
- round
- sec
- sec_fraction
- second
- second_fraction
- start
- step
- strftime
- succ
- time_to_day_fraction
- to_c
- to_date
- to_datetime
- to_f
- to_i
- to_int
- to_json
- to_r
- to_s
- to_time
- truncate
- upto
- wday
- weeknum_to_jd
- xmlschema
- yday
- year
- zone
- zone_to_diff
- _httpdate
- _iso8601
- _jisx0301
- _parse
- _rfc2822
- _rfc3339
- _rfc822
- _strptime
- _xmlschema
- civil
- commercial
- gregorian_leap?
- httpdate
- iso8601
- jd
- jisx0301
- json_create
- julian_leap?
- leap?
- new
- new
- new!
- ordinal
- parse
- rfc2822
- rfc3339
- rfc822
- strptime
- today
- valid_civil?
- valid_commercial?
- valid_date?
- valid_jd?
- valid_ordinal?
- xmlschema
-
_parse_day - _parse_ddd
- _parse_dot
- _parse_eu
- _parse_iso
- _parse_iso2
- _parse_jis
- _parse_mday
- _parse_mon
- _parse_sla
- _parse_time
- _parse_us
- _parse_vms
- _parse_year
- _strptime_i
- complete_frags
- new_by_frags
- now
- nth_kday
- num_pattern?
- once
- rewrite_frags
- s3e
- valid_date_frags?
- valid_nth_kday?
- valid_time?
- valid_time_frags?
- valid_weeknum?
- weeknum
- civil
- commercial
- dx_addsub
- dx_conv0
- dx_conv1
- dx_muldiv
- emit
- emit_a
- emit_ad
- emit_au
- emit_n
- emit_sn
- emit_w
- emit_z
- fix_style
- nth_kday?
- ordinal
- time
- weeknum0
- weeknum1
- wnum0
- wnum1