From e4f44e30bda20fc776532b3df8abf9f4f03257f0 Mon Sep 17 00:00:00 2001
From: oittaa <8972248+oittaa@users.noreply.github.com>
Date: Wed, 8 Dec 2021 22:13:55 +0100
Subject: [PATCH] Allow lower case "t" and "z" in datetimes (#149)

* Allow lower case "t" and "z" in datetimes

https://datatracker.ietf.org/doc/html/rfc3339#section-5.6

* Add changelog entry

Co-authored-by: Taneli Hukkinen <3275109+hukkin@users.noreply.github.com>
---
 CHANGELOG.md | 2 ++
 tomli/_re.py | 4 ++--
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 69598c1..3327b19 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,8 @@
   - Python 3.6 support
   - Support for text file objects as `load` input. Use binary file objects instead.
   - First argument of `load` and `loads` can no longer be passed by keyword.
+- Fixed
+  - Allow lower case "t" and "z" in datetimes
 - Improved
   - Raise an error when dotted keys define values outside the "current table".
     Technically speaking TOML v1.0.0 does allow such assignments
diff --git a/tomli/_re.py b/tomli/_re.py
index fa599d7..c13269d 100644
--- a/tomli/_re.py
+++ b/tomli/_re.py
@@ -36,9 +36,9 @@
     fr"""
 ([0-9]{{4}})-(0[1-9]|1[0-2])-(0[1-9]|[12][0-9]|3[01])  # date, e.g. 1988-10-27
 (?:
-    [T ]
+    [Tt ]
     {_TIME_RE_STR}
-    (?:(Z)|([+-])([01][0-9]|2[0-3]):([0-5][0-9]))?     # optional time offset
+    (?:([Zz])|([+-])([01][0-9]|2[0-3]):([0-5][0-9]))?  # optional time offset
 )?
 """,
     flags=re.VERBOSE,