v5.0.0 🚨 -breaking

🚨 all methods now immutable by default.🚨 -- existing code will now need to be s = s.add(1,'day') --- (instead of s.add(1,'day'))
move unix-formating out of .format() into .unixFmt()
support new {hour} oclock-style format templates
change default .format() response to yyyy-mm-dd
uppercase month and day names in .dayName()
support city-names, EST, PDT, etc as input
set default silent: true to avoid unwanted logging

5.1.0

titlecase short-forms of months, days in .format()
support implicit date in nov 2019
support tues March 5th 2018 inputs
pretty-dramatic speed optimizations (~50%)

v4.0.0

format(iso) now uses . for millisecond separator: 2016-11-04T09:00:59.122Z
adds .since() method to calculate a human-readable diff
support string/number input to .diff()
support ordinal inputs, like June 5th 2018
isAwake() method
alias for .plus() .minus() methods
.diff() without a unit does a couple units together
update zonefile to proper dst-flip time

v4.0.1

support .from() and .fromNow() methods

v4.1.0

fix 'February 30th' regression
remove denormalized .valid boolean on Spacetime class

v4.2.0

fix dayOfYear regression on 31st days
support space in ISO-186 format
update deps, use babel-env

v4.2.2

adds .extend() method for authoring plugins

v4.3.0

assume current year with input spacetime('July 5th')
do larger .diff() operations (gt 1yr) in fast-mode
support BC formatting of input and in s.format('year')
bug fix for iso-format hour-offsets (#58)

v4.4.0

big - swap interpretation of ISO date offsets -0500 → +5 offset #61

v4.5.0

update a few TZ offsets in mostly eastern-Russia
updates to 2019 Palestinian dst dates
fixes for missing immutable setter methods

v3.0.1

fallback to UTC, instead of PST if no Intl is present
support passing-in offsets as ISO_8601 date-strings
add epoch-seconds warning msg
allow getting/setting new timezones

v3.1.0

dramatic speedup by optimizing walkTo method

v3.2.0

update zonefile to 2018 dst dates

v2.0.0

fix major southern-hemisphere issue
re-structure d.timezone() response
add .hemisphere() method
use proper short-day forms

v2.1.0

support unix/unicode time-formating basic-level
add .era() get/set method
found 6 or 7 wrong offsets

v1.0.0 🚀

v1.2.0

adds isBetween() method

v1.3.0

adds spacetime.whereIts() method
actually implement 😓 season by hemisphere

v1.3.1

adds spacetime.i18n() method
adds spacetime.nearest() method
support for "quarterHour" units - '4:15, 4:30, 4:45, 5:00' etc

v1.3.2

fix for inf-loop regression on DST-switch