# Poco

# class DateTimeFormat

Library: Foundation
Package: DateTime
Header: Poco/DateTimeFormat.h

## Description

Definition of date/time formats and various constants used by DateTimeFormatter and DateTimeParser.

## Member Summary

Member Functions: hasFormat, isValid

## Member Functions

### hasFormat

static bool hasFormat(
const std::string & fmt
);

Returns true if fmt is a known standard format.

### isValid

static bool isValid(
const std::string & dateTime
);

Returns true if dateTime validates against at least one supported format.

## Variables

### ASCTIME_FORMAT

static const std::string ASCTIME_FORMAT;

The date/time format produced by the ANSI C asctime() function.

Example:

    Sat Jan  1 12:00:00 2005

### ASCTIME_REGEX

static const std::string ASCTIME_REGEX;

### HTTP_FORMAT

static const std::string HTTP_FORMAT;

The date/time format defined in the HTTP specification (RFC 2616), which is basically a variant of RFC 1036 with a zero-padded day field.

Examples:

    Sat, 01 Jan 2005 12:00:00 +0100
    Sat, 01 Jan 2005 11:00:00 GMT

### HTTP_REGEX

static const std::string HTTP_REGEX;

### ISO8601_FORMAT

static const std::string ISO8601_FORMAT;

The date/time format defined in the ISO 8601 standard.

Examples:

    2005-01-01T12:00:00+01:00
    2005-01-01T11:00:00Z

### ISO8601_FRAC_FORMAT

static const std::string ISO8601_FRAC_FORMAT;

The date/time format defined in the ISO 8601 standard, with fractional seconds.

Examples:

    2005-01-01T12:00:00.000000+01:00
    2005-01-01T11:00:00.000000Z

### ISO8601_REGEX

static const std::string ISO8601_REGEX;

### MONTH_NAMES

static const std::string MONTH_NAMES[12];

English names of months (January, February, ...).

### RFC1036_FORMAT

static const std::string RFC1036_FORMAT;

The date/time format defined in RFC 1036 (obsoletes RFC 850).

Examples:

    Saturday, 1 Jan 05 12:00:00 +0100
    Saturday, 1 Jan 05 11:00:00 GMT

### RFC1036_REGEX

static const std::string RFC1036_REGEX;

### RFC1123_FORMAT

static const std::string RFC1123_FORMAT;

The date/time format defined in RFC 1123 (obsoletes RFC 822).

Examples:

    Sat, 1 Jan 2005 12:00:00 +0100
    Sat, 1 Jan 2005 11:00:00 GMT

### RFC1123_REGEX

static const std::string RFC1123_REGEX;

### RFC822_FORMAT

static const std::string RFC822_FORMAT;

The date/time format defined in RFC 822 (obsoleted by RFC 1123).

Examples:

    Sat, 1 Jan 05 12:00:00 +0100
    Sat, 1 Jan 05 11:00:00 GMT

### RFC822_REGEX

static const std::string RFC822_REGEX;

### RFC850_FORMAT

static const std::string RFC850_FORMAT;

The date/time format defined in RFC 850 (obsoleted by RFC 1036).

Examples:

    Saturday, 1-Jan-05 12:00:00 +0100
    Saturday, 1-Jan-05 11:00:00 GMT

### RFC850_REGEX

static const std::string RFC850_REGEX;

### SORTABLE_FORMAT

static const std::string SORTABLE_FORMAT;

A simple, sortable date/time format.

Example:

    2005-01-01 12:00:00

### SORTABLE_REGEX

static const std::string SORTABLE_REGEX;

### WEEKDAY_NAMES

static const std::string WEEKDAY_NAMES[7];

English names of week days (Sunday, Monday, Tuesday, ...).