2072471 - Thunderbird mangles vCard V4.0 REV timestamp invalidating vcard.

Status: RESOLVED FIXED

(Thunderbird :: Address Book, defect)

Description

[Alan MacLeod]

Steps to reproduce:

Create a vcard in Migadu's web browser addressbook, sync with Thunderbird using carddav, modify a field in Thunderbird and sync. Change is not displayed in Migadu's addressbook, as the Vcard is no longer valid.

Actual results:

Migadu's web browser addressbook vcard implementation sets REV using YYYY-MM-DDTHH:mm:ssZ - for example 2026-09-14T10:15:20Z, which is compliant with ISO8601 format timestamp per the spec.

When Thunderbird updates the vcard it overwrites REV and the above example is now 2026-09-T4T10:1 which is not a valid timestamp.

Expected results:

Thunderbird should use a legitimate timestamp - preferably YYYY-MM-DDTHH:mm:ssZ to remove any ambiguity around timezone of timestamp.

The layout of the Thunderbird written timestamp suggests Thunderbird assumes the first 8 char are date, a T, and then next 6 char are time - irrespective of their actual values.

Comment 1

[Magnus Melin [:mkmelin]]

Ugh.

Comment 2

[Magnus Melin [:mkmelin]]

Attachment: Bug 2072471 - Don't mangle a vCard 4.0 REV timestamp given in the extended format. r=#thunderbird-reviewers

Fixing this upstream is https://github.com/kewisch/ical.js/issues/1028

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/comm-central/rev/8a1701710fcf
Don't mangle a vCard 4.0 REV timestamp given in the extended format. r=tobyp