Dates and Time

# Dates and Time ## Dates and Time Types > []```@docs Base.Dates.Period Base.Dates.CompoundPeriod Base.Dates.Instant Base.Dates.UTInstant Base.Dates.TimeType Base.Dates.DateTime Base.Dates.Date Base.Dates.Time ``` ## Dates Functions All Dates functions are defined in the `Dates` module; note that only the `Date`, `DateTime`, and `now` functions are exported; to use all other `Dates` functions, you'll need to prefix each function call with an explicit `Dates.`, e.g. `Dates.dayofweek(dt)`. Alternatively, you can write `using Base.Dates` to bring all exported functions into `Main` to be used without the `Dates.` prefix. ```@docs Base.Dates.DateTime(::Int64, ::Int64, ::Int64, ::Int64, ::Int64, ::Int64, ::Int64) Base.Dates.DateTime(::Base.Dates.Period...) Base.Dates.DateTime(::Function, ::Any...) Base.Dates.DateTime(::Base.Dates.TimeType) Base.Dates.DateTime(::AbstractString, ::AbstractString) Base.Dates.format Base.Dates.DateFormat Base.Dates.@dateformat_str Base.Dates.DateTime(::AbstractString, ::Base.Dates.DateFormat) Base.Dates.Date(::Int64, ::Int64, ::Int64) Base.Dates.Date(::Base.Dates.Period...) Base.Dates.Date(::Function, ::Any, ::Any, ::Any) Base.Dates.Date(::Base.Dates.TimeType) Base.Dates.Date(::AbstractString, ::AbstractString) Base.Dates.Date(::AbstractString, ::Base.Dates.DateFormat) Base.Dates.Time(::Int64::Int64, ::Int64, ::Int64, ::Int64, ::Int64) Base.Dates.Time(::Base.Dates.TimePeriod...) Base.Dates.Time(::Function, ::Any...) Base.Dates.Time(::Base.Dates.DateTime) Base.Dates.now() Base.Dates.now(::Type{Base.Dates.UTC}) Base.eps ``` ### Accessor Functions ```@docs Base.Dates.year Base.Dates.month Base.Dates.week Base.Dates.day Base.Dates.hour Base.Dates.minute Base.Dates.second Base.Dates.millisecond Base.Dates.microsecond Base.Dates.nanosecond Base.Dates.Year(::Base.Dates.TimeType) Base.Dates.Month(::Base.Dates.TimeType) Base.Dates.Week(::Base.Dates.TimeType) Base.Dates.Day(::Base.Dates.TimeType) Base.Dates.Hour(::DateTime) Base.Dates.Minute(::DateTime) Base.Dates.Second(::DateTime) Base.Dates.Millisecond(::DateTime) Base.Dates.Microsecond(::Dates.Time) Base.Dates.Nanosecond(::Dates.Time) Base.Dates.yearmonth Base.Dates.monthday Base.Dates.yearmonthday ``` ### Query Functions ```@docs Base.Dates.dayname Base.Dates.dayabbr Base.Dates.dayofweek Base.Dates.dayofmonth Base.Dates.dayofweekofmonth Base.Dates.daysofweekinmonth Base.Dates.monthname Base.Dates.monthabbr Base.Dates.daysinmonth Base.Dates.isleapyear Base.Dates.dayofyear Base.Dates.daysinyear Base.Dates.quarterofyear Base.Dates.dayofquarter ``` ### Adjuster Functions ```@docs Base.trunc(::Base.Dates.TimeType, ::Type{Base.Dates.Period}) Base.Dates.firstdayofweek Base.Dates.lastdayofweek Base.Dates.firstdayofmonth Base.Dates.lastdayofmonth Base.Dates.firstdayofyear Base.Dates.lastdayofyear Base.Dates.firstdayofquarter Base.Dates.lastdayofquarter Base.Dates.tonext(::Base.Dates.TimeType, ::Int) Base.Dates.toprev(::Base.Dates.TimeType, ::Int) Base.Dates.tofirst Base.Dates.tolast Base.Dates.tonext(::Function, ::Base.Dates.TimeType) Base.Dates.toprev(::Function, ::Base.Dates.TimeType) ``` ### Periods ```@docs Base.Dates.Period(::Any) Base.Dates.CompoundPeriod(::Vector{<:Base.Dates.Period}) Base.Dates.default ``` ### Rounding Functions `Date` and `DateTime` values can be rounded to a specified resolution (e.g., 1 month or 15 minutes) with `floor`, `ceil`, or `round`. ```@docs Base.floor(::Base.Dates.TimeType, ::Base.Dates.Period) Base.ceil(::Base.Dates.TimeType, ::Base.Dates.Period) Base.round(::Base.Dates.TimeType, ::Base.Dates.Period, ::RoundingMode{:NearestTiesUp}) ``` The following functions are not exported: ```@docs Base.Dates.floorceil Base.Dates.epochdays2date Base.Dates.epochms2datetime Base.Dates.date2epochdays Base.Dates.datetime2epochms ``` ### Conversion Functions ```@docs Base.Dates.today Base.Dates.unix2datetime Base.Dates.datetime2unix Base.Dates.julian2datetime Base.Dates.datetime2julian Base.Dates.rata2datetime Base.Dates.datetime2rata ``` ### Constants Days of the Week: | Variable | Abbr. | Value (Int) | |:----------- |:----- |:----------- | | `Monday` | `Mon` | 1 | | `Tuesday` | `Tue` | 2 | | `Wednesday` | `Wed` | 3 | | `Thursday` | `Thu` | 4 | | `Friday` | `Fri` | 5 | | `Saturday` | `Sat` | 6 | | `Sunday` | `Sun` | 7 | Months of the Year: | Variable | Abbr. | Value (Int) | |:----------- |:----- |:----------- | | `January` | `Jan` | 1 | | `February` | `Feb` | 2 | | `March` | `Mar` | 3 | | `April` | `Apr` | 4 | | `May` | `May` | 5 | | `June` | `Jun` | 6 | | `July` | `Jul` | 7 | | `August` | `Aug` | 8 | | `September` | `Sep` | 9 | | `October` | `Oct` | 10 | | `November` | `Nov` | 11 | | `December` | `Dec` | 12 |

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