The OpenD Programming Language

Date

Represents a date in the Proleptic Gregorian Calendar ranging from 32,768 B.C. to 32,767 A.D. Positive years are A.D. Non-positive years are B.C.

Year, month, and day are kept separately internally so that Date is optimized for calendar-based operations.

Date uses the Proleptic Gregorian Calendar, so it assumes the Gregorian leap year calculations for its entire length. As per ISO 8601, it treats 1 B.C. as year 0, i.e. 1 B.C. is 0, 2 B.C. is -1, etc. Use yearBC to use B.C. as a positive integer with 1 B.C. being the year prior to 1 A.D.

Year 0 is a leap year.

struct Date {

this(int year, int month, int day);

int opCmp(Date rhs);

short year [@property getter];

int year [@property setter];

ushort yearBC [@property getter];

int yearBC [@property setter];

Month month [@property getter];

Month month [@property setter];

ubyte day [@property getter];

int day [@property setter];

Date add(long value, AllowDayOverflow allowOverflow);

Date roll(long value, AllowDayOverflow allowOverflow);

Date roll(long days);

struct Duration via public import core.time : Duration;;

Date opBinary(Duration duration);

Date opOpAssign(Duration duration);

Duration opBinary(Date rhs);

int diffMonths(Date rhs);

bool isLeapYear [@property getter];

DayOfWeek dayOfWeek [@property getter];

ushort dayOfYear [@property getter];

int dayOfYear [@property setter];

int dayOfGregorianCal [@property getter];

int dayOfGregorianCal [@property setter];

auto isoWeekAndYear [@property getter];

ubyte isoWeek [@property getter];

short isoWeekYear [@property getter];

Date endOfMonth [@property getter];

ubyte daysInMonth [@property getter];

bool isAD [@property getter];

long julianDay [@property getter];

long modJulianDay [@property getter];

string toISOString();

void toISOString(W writer);

string toISOExtString();

void toISOExtString(W writer);

string toSimpleString();

void toSimpleString(W writer);

string toString();

void toString(W writer);

static Date fromISOString(S isoString);

static Date fromISOExtString(S isoExtString);

static Date fromSimpleString(S simpleString);

static Date min [@property getter];

static Date max [@property getter];

typeof(fmt) format(Args args) via import std.format : format;;

}

Constructors

this this(int year, int month, int day)
this this(int day)

Members

Functions

add Date add(long value, AllowDayOverflow allowOverflow): Adds the given number of years or months to this Date, mutating it. A negative number will subtract.
diffMonths int diffMonths(Date rhs): Returns the difference between the two Dates in months.
opBinary Date opBinary(Duration duration): Gives the result of adding or subtracting a core.time.Duration from
opBinary Duration opBinary(Date rhs): Gives the difference between two Dates.
opCmp int opCmp(Date rhs): Compares this Date with the given Date.
opOpAssign Date opOpAssign(Duration duration): Gives the result of adding or subtracting a core.time.Duration from this Date, as well as assigning the result to this Date.
roll Date roll(long value, AllowDayOverflow allowOverflow): Adds the given number of years or months to this Date, mutating it. A negative number will subtract.
roll Date roll(long days): Adds the given number of units to this Date, mutating it. A negative number will subtract.
toISOExtString string toISOExtString()
void toISOExtString(W writer): Converts this Date to a string with the format YYYY-MM-DD. If writer is set, the resulting string will be written directly to it.
toISOString string toISOString()
void toISOString(W writer): Converts this Date to a string with the format YYYYMMDD. If writer is set, the resulting string will be written directly to it.
toSimpleString string toSimpleString()
void toSimpleString(W writer): Converts this Date to a string with the format YYYY-Mon-DD. If writer is set, the resulting string will be written directly to it.
toString string toString()
void toString(W writer): Converts this Date to a string.

Properties

day ubyte day [@property getter]: Day of a Gregorian Month.
day int day [@property setter]: Day of a Gregorian Month.
dayOfGregorianCal int dayOfGregorianCal [@property getter]: The Xth day of the Gregorian Calendar that this Date is on.
dayOfGregorianCal int dayOfGregorianCal [@property setter]: The Xth day of the Gregorian Calendar that this Date is on.
dayOfWeek DayOfWeek dayOfWeek [@property getter]: Day of the week this Date is on.
dayOfYear ushort dayOfYear [@property getter]: Day of the year this Date is on.
dayOfYear int dayOfYear [@property setter]: Day of the year.
daysInMonth ubyte daysInMonth [@property getter]: The last day in the month that this Date is in.
endOfMonth Date endOfMonth [@property getter]: Date for the last day in the month that this Date is in.
isAD bool isAD [@property getter]: Whether the current year is a date in A.D.
isLeapYear bool isLeapYear [@property getter]: Whether this Date is in a leap year.
isoWeek ubyte isoWeek [@property getter]: The ISO 8601 week of the year that this Date is in.
isoWeekAndYear auto isoWeekAndYear [@property getter]: The ISO 8601 week and year of the year that this Date is in.
isoWeekYear short isoWeekYear [@property getter]: The year inside the ISO 8601 week calendar that this Date is in.
julianDay long julianDay [@property getter]: The Julian day for this Date at noon (since the Julian day changes at noon).
max Date max [@property getter]: Returns the Date farthest in the future which is representable by Date.
min Date min [@property getter]: Returns the Date farthest in the past which is representable by Date.
modJulianDay long modJulianDay [@property getter]: The modified Julian day for any time on this date (since, the modified Julian day changes at midnight).
month Month month [@property getter]: Month of a Gregorian Year.
month Month month [@property setter]: Month of a Gregorian Year.
year short year [@property getter]: Year of the Gregorian Calendar. Positive numbers are A.D. Non-positive are B.C.
year int year [@property setter]: Year of the Gregorian Calendar. Positive numbers are A.D. Non-positive are B.C.
yearBC ushort yearBC [@property getter]: Year B.C. of the Gregorian Calendar counting year 0 as 1 B.C.
yearBC int yearBC [@property setter]: Year B.C. of the Gregorian Calendar counting year 0 as 1 B.C.

Static functions

fromISOExtString Date fromISOExtString(S isoExtString): Creates a Date from a string with the format YYYY-MM-DD. Whitespace is stripped from the given string.
fromISOString Date fromISOString(S isoString): Creates a Date from a string with the format YYYYMMDD. Whitespace is stripped from the given string.
fromSimpleString Date fromSimpleString(S simpleString): Creates a Date from a string with the format YYYY-Mon-DD. Whitespace is stripped from the given string.

Structs

Duration (from core.time) struct Duration via public import core.time : Duration;: Represents a duration of time of weeks or less (kept internally as hnsecs). (e.g. 22 days or 700 seconds).

Examples

import core.time : days;

auto d = Date(2000, 6, 1);

assert(d.dayOfYear == 153);
assert(d.dayOfWeek == DayOfWeek.thu);

d += 10.days;
assert(d == Date(2000, 6, 11));

assert(d.toISOExtString() == "2000-06-11");
assert(d.toISOString() == "20000611");
assert(d.toSimpleString() == "2000-Jun-11");

assert(Date.fromISOExtString("2018-01-01") == Date(2018, 1, 1));
assert(Date.fromISOString("20180101") == Date(2018, 1, 1));
assert(Date.fromSimpleString("2018-Jan-01") == Date(2018, 1, 1));

Meta

Source

See Implementation

std datetime date aliases

enums

functions

structs

templates

variables

timeStrings