spatialtime

# This snippet demonstrates Pythonic formatting and parsing of 
# ISO 8601 ordinal dates (4-digit year + "-" + ordinal day).
# Note: an ordinal day in this context is the nth day of 
# the year, with Jan 1 being ordinal day 1 and Dec 31 
# of non-leap year (a "common year") being day 365.

from datetime import datetime


d = datetime.strptime("2020-355", "%Y-%j")

spatialtime

# This snippet demonstrates Pythonic formatting and parsing of 
# ISO 8601 weeks.
# The first ISO week of the year is the first week containing
# a Thursday.
# ISO weeks begin on Monday, with Monday being day 1.

from datetime import datetime


d = datetime.strptime("2020-W17-7", "%G-W%V-%u")

spatialtime

# This snippet demonstrates Pythonic formatting and parsing of 
# ISO 8601 durations.
# A little work is required to navigate between Python's
# timedelta syntax and ISO 8601 duration syntax.

import re

from datetime import datetime
from datetime import timedelta

spatialtime

# This snippet demonstrates Pythonic formatting and parsing of ISO 8601 dates.

from datetime import datetime


# datetime.strptime() is used to parse iso 8601 strings to 
# Python datetime.datetime instances.

# datetime.strftime() is used to format Python datetime.datetime instances
# to ISO 8601 strings. 

spatialtime

// This snippet demonstrates Golang formatting and parsing of 
// ISO 8601 dates, times, time zones

import(
    "fmt"
    "time"
)

loc, _ := time.LoadLocation("America/Los_Angeles")

spatialtime

// Passing a string to new Date() is cross-implementation-safe only if the 
// format of the string conforms to ECMAScript's specified format.
// From the specification (https://tc39.es/ecma262/#sec-date.parse):
// " If the String does not conform to that format the function may fall 
// back to any implementation-specific heuristics or implementation-specific date formats. "
// As such, we are good to go here with passing it a correct ISO 8601 date/time string.

let d = new Date("2020-04-02T13:00:00.000Z")

// The beauty of a fixed-width ISO 8601 output string.

spatialtime

/*
 * dateFromISODatetime creates a JavaScript date from a string that adheres to 
 * ECMAScript's specified syntax:
 *  Zulu/UTC time:   
 *      YYYY-MM-DDTHH:mm:ss.sssZ  
 *  Specified time zone offset: 
 *      YYYY-MM-DDTHH:mm:ss.sss±HH:mm
 *  Local time (no time zone specification): 
 *      YYYY-MM-DDTHH:mm:ss.sss
 */

spatialtime

//------------------------------------------------------------------------------
// Constants
//------------------------------------------------------------------------------
const MIN_YEAR =1;
const MAX_YEAR = 9999;
const MIN_MONTH = 1;
const MAX_MONTH = 12;
const MIN_DAY = 1;
const MIN_HOUR = 0;
const MAX_HOUR = 24;

spatialtime

//------------------------------------------------------------------------------
// Constants
//------------------------------------------------------------------------------
const MIN_YEAR =1;
const MAX_YEAR = 9999;
const MIN_MONTH = 1;
const MAX_MONTH = 12;
const MIN_DAY = 1;
const MIN_HOUR = 0;
const MAX_HOUR = 24;

spatialtime

// This snippet demonstrates Golang formatting and parsing of ISO 8601 durations.
// A little work is required to navigate between Golang's
// duration syntax and ISO 8601 duration syntax.

import (
	"errors"
	"fmt"
	"regexp"
	"strings"
	"time"