remove potential future implementation of DateTime(), Date() and Time()

NEWS.md

@@ -450,8 +450,7 @@ Deprecated or removed
     the `allow_prompt` keyword in the `LibGit2.CredentialPayload` constructor ([#23690]).
 
   * `DateTime()`, `Date()`, and `Time()` have been deprecated, instead use `DateTime(1)`, `Date(1)`
-    and `Time(0)` respectively. In a future release `DateTime()`, `Date()`, and `Time()` will be
-    alternatives to `now()` ([#23724]).
+    and `Time(0)` respectively ([#23724]).
 
 Command-line option changes
 ---------------------------

base/dates/types.jl

@@ -256,10 +256,10 @@ end
 Construct a `DateTime` type by `Period` type parts. Arguments may be in any order. DateTime
 parts not provided will default to the value of `Dates.default(period)`.
 """
-function DateTime(periods::Period...)
+function DateTime(period::Period, periods::Period...)
     y = Year(1); m = Month(1); d = Day(1)
     h = Hour(0); mi = Minute(0); s = Second(0); ms = Millisecond(0)
-    for p in periods
+    for p in (period, periods...)
         isa(p, Year) && (y = p::Year)
         isa(p, Month) && (m = p::Month)
         isa(p, Day) && (d = p::Day)
@@ -277,9 +277,9 @@ end
 Construct a `Date` type by `Period` type parts. Arguments may be in any order. `Date` parts
 not provided will default to the value of `Dates.default(period)`.
 """
-function Date(periods::Period...)
+function Date(period::Period, periods::Period...)
     y = Year(1); m = Month(1); d = Day(1)
-    for p in periods
+    for p in (period, periods...)
         isa(p, Year) && (y = p::Year)
         isa(p, Month) && (m = p::Month)
         isa(p, Day) && (d = p::Day)
@@ -293,10 +293,10 @@ end
 Construct a `Time` type by `Period` type parts. Arguments may be in any order. `Time` parts
 not provided will default to the value of `Dates.default(period)`.
 """
-function Time(periods::TimePeriod...)
+function Time(period::TimePeriod, periods::TimePeriod...)
     h = Hour(0); mi = Minute(0); s = Second(0)
     ms = Millisecond(0); us = Microsecond(0); ns = Nanosecond(0)
-    for p in periods
+    for p in (period, periods...)
         isa(p, Hour) && (h = p::Hour)
         isa(p, Minute) && (mi = p::Minute)
         isa(p, Second) && (s = p::Second)
@@ -312,13 +312,6 @@ DateTime(y, m=1, d=1, h=0, mi=0, s=0, ms=0) = DateTime(Int64(y), Int64(m), Int64
 Date(y, m=1, d=1) = Date(Int64(y), Int64(m), Int64(d))
 Time(h, mi=0, s=0, ms=0, us=0, ns=0) = Time(Int64(h), Int64(mi), Int64(s), Int64(ms), Int64(us), Int64(ns))
 
-# Empty constructors default to 'now'
-if VERSION >= v"0.8-"
-    DateTime() = now()
-    Date() = today()
-    Time() = Time(now())
-end
-
 # Traits, Equality
 Base.isfinite(::Union{Type{T}, T}) where {T<:TimeType} = true
 calendar(dt::DateTime) = ISOCalendar

test/dates/types.jl

@@ -58,14 +58,6 @@ t = Dates.Time(Dates.Nanosecond(82800000000000))
 @test Dates.Time(23, 0, 0, 0, 0) == t
 @test Dates.Time(23, 0, 0, 0, 0, 0) == t
 
-# Test empty constructors now equivalence
-if VERSION >= v"0.8-"
-    present = now()
-    @test Dates.DateTime(present) <= Dates.DateTime()
-    @test Dates.Date(present) <= Dates.Date()
-    @test Dates.Time(present) <= Dates.Time()
-end
-
 # Test various input types for Date/DateTime
 test = Dates.Date(1, 1, 1)
 @test Dates.Date(Int8(1), Int8(1), Int8(1)) == test