icalendar.prop.dt.datetime module

DATE-TIME property type from RFC 5545.

class icalendar.prop.dt.datetime.vDatetime(dt, /, params=None)

Bases: TimeBase

Date-Time

Value Name:

DATE-TIME

Purpose:

This value type is used to identify values that specify a precise calendar date and time of day. The format is based on the ISO.8601.2004 complete representation.

Format Definition:

This value type is defined by the following notation:

date-time  = date "T" time

date       = date-value
date-value         = date-fullyear date-month date-mday
date-fullyear      = 4DIGIT
date-month         = 2DIGIT        ;01-12
date-mday          = 2DIGIT        ;01-28, 01-29, 01-30, 01-31
                                   ;based on month/year
time               = time-hour time-minute time-second [time-utc]
time-hour          = 2DIGIT        ;00-23
time-minute        = 2DIGIT        ;00-59
time-second        = 2DIGIT        ;00-60
time-utc           = "Z"

The following is the representation of the date-time format.

YYYYMMDDTHHMMSS

Description:

vDatetime is timezone aware and uses a timezone library. When a vDatetime object is created from an ical string, you can pass a valid timezone identifier. When a vDatetime object is created from a Python datetime object, it uses the tzinfo component, if present. Otherwise a timezone-naive object is created. Be aware that there are certain limitations with timezone naive DATE-TIME components in the icalendar standard.

Example

The following represents March 2, 2021 at 10:15 AM with local time:

>>> from icalendar import vDatetime
>>> datetime = vDatetime.from_ical("20210302T101500")
>>> datetime.tzname()
>>> datetime.year
2021
>>> datetime.minute
15

The following represents March 2, 2021 at 10:15 AM in New York:

>>> datetime = vDatetime.from_ical("20210302T101500", 'America/New_York')
>>> datetime.tzname()
'EST'

The following represents March 2, 2021 at 10:15 AM in Berlin:

>>> from zoneinfo import ZoneInfo
>>> timezone = ZoneInfo("Europe/Berlin")
>>> vDatetime.from_ical("20210302T101500", timezone)
datetime.datetime(2021, 3, 2, 10, 15, tzinfo=ZoneInfo(key='Europe/Berlin'))

property RANGE: RANGE | str | None

Specify the effective range of recurrence instances from the instance specified by the recurrence identifier specified by the property.

Description:

This parameter can be specified on a property that specifies a recurrence identifier. The parameter specifies the effective range of recurrence instances that is specified by the property. The effective range is from the recurrence identifier specified by the property. If this parameter is not specified on an allowed property, then the default range is the single instance specified by the recurrence identifier value of the property. The parameter value can only be "THISANDFUTURE" to indicate a range defined by the recurrence identifier and all subsequent instances. The value "THISANDPRIOR" is deprecated by this revision of iCalendar and MUST NOT be generated by applications.

property RELATED: RELATED | str

Specify the relationship of the alarm trigger with respect to the start or end of the calendar component.

Description:

This parameter can be specified on properties that specify an alarm trigger with a "DURATION" value type. The parameter specifies whether the alarm will trigger relative to the start or end of the calendar component. The parameter value START will set the alarm to trigger off the start of the calendar component; the parameter value END will set the alarm to trigger off the end of the calendar component. If the parameter is not specified on an allowable property, then the default is START.

property TZID: str | None

Specify the identifier for the time zone definition for a time component in the property value.

Description:

This parameter MUST be specified on the "DTSTART", "DTEND", "DUE", "EXDATE", and "RDATE" properties when either a DATE-TIME or TIME value type is specified and when the value is neither a UTC or a "floating" time. Refer to the DATE-TIME or TIME value type definition for a description of UTC and "floating time" formats. This property parameter specifies a text value that uniquely identifies the "VTIMEZONE" calendar component to be used when evaluating the time portion of the property. The value of the "TZID" property parameter will be equal to the value of the "TZID" property for the matching time zone definition. An individual "VTIMEZONE" calendar component MUST be specified for each unique "TZID" parameter value specified in the iCalendar object.

The parameter MUST be specified on properties with a DATE-TIME value if the DATE-TIME is not either a UTC or a "floating" time. Failure to include and follow VTIMEZONE definitions in iCalendar objects may lead to inconsistent understanding of the local time at any given location.

The presence of the SOLIDUS character as a prefix, indicates that this "TZID" represents a unique ID in a globally defined time zone registry (when such registry is defined).

Note

This document does not define a naming convention for time zone identifiers. Implementers may want to use the naming conventions defined in existing time zone specifications such as the public-domain TZ database (TZDB). The specification of globally unique time zone identifiers is not addressed by this document and is left for future study.

property VALUE: str

The VALUE parameter or the default.

Purpose:

VALUE explicitly specify the value type format for a property value.

Description:

This parameter specifies the value type and format of the property value. The property values MUST be of a single value type. For example, a "RDATE" property cannot have a combination of DATE-TIME and TIME value types.

If the property's value is the default value type, then this parameter need not be specified. However, if the property's default value type is overridden by some other allowable value type, then this parameter MUST be specified.

Applications MUST preserve the value data for x-name and iana-token values that they don't recognize without attempting to interpret or parse the value data.

Returns:

The VALUE parameter or the default.

Examples

The VALUE defaults to the name of the property. Note that it is case-insensitive but always uppercase.

>>> from icalendar import vBoolean
>>> b = vBoolean(True)
>>> b.VALUE
'BOOLEAN'

Setting the VALUE parameter of a typed property usually does not make sense. For convenience, using this property, the value will be converted to an uppercase string. If you have some custom property, you might use it like this:

>>> from icalendar import vUnknown, Event
>>> v = vUnknown("Some property text.")
>>> v.VALUE = "x-type"  # lower case
>>> v.VALUE
'X-TYPE'
>>> event = Event()
>>> event.add("x-prop", v)
>>> print(event.to_ical())
BEGIN:VEVENT
X-PROP;VALUE=X-TYPE:Some property text.
END:VEVENT

default_value: ClassVar[str] = 'DATE-TIME'

classmethod examples()

Examples of vDatetime.

Return type:

list[None]

static from_ical(ical, timezone=None)

Create a datetime from the RFC string.

classmethod from_jcal(jcal_property)

Parse jCal from RFC 7265.

Parameters:

jcal_property (list) – The jCal property to parse.

Raises:

JCalParsingError – If the provided jCal is invalid.

Return type:

None

ignore_for_equality = {'TZID', 'VALUE'}

is_utc()

Whether this datetime is UTC.

Return type:

bool

params: Parameters

classmethod parse_jcal_value(jcal)

Parse a jCal string to a datetime.datetime.

Raises:

JCalParsingError – If it can't parse a date-time value.

Return type:

datetime

to_ical()

to_jcal(name)

The jCal representation of this property according to RFC 7265.

Return type:

list