From 4923affa7722dfc751f1074348e6dad214fe0c08 Mon Sep 17 00:00:00 2001
From: Emile Bangma <github@emilebangma.com>
Date: Sun, 21 Sep 2025 17:14:03 +0000
Subject: [PATCH] fix(callouts)!: match callout DOM to Obsidian (#2104)

---
 quartz/plugins/transformers/lastmod.ts |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/quartz/plugins/transformers/lastmod.ts b/quartz/plugins/transformers/lastmod.ts
index 668634a..32a89cc 100644
--- a/quartz/plugins/transformers/lastmod.ts
+++ b/quartz/plugins/transformers/lastmod.ts
@@ -12,7 +12,17 @@
   priority: ["frontmatter", "git", "filesystem"],
 }
 
+// YYYY-MM-DD
+const iso8601DateOnlyRegex = /^\d{4}-\d{2}-\d{2}$/
+
 function coerceDate(fp: string, d: any): Date {
+  // check ISO8601 date-only format
+  // we treat this one as local midnight as the normal
+  // js date ctor treats YYYY-MM-DD as UTC midnight
+  if (typeof d === "string" && iso8601DateOnlyRegex.test(d)) {
+    d = `${d}T00:00:00`
+  }
+
   const dt = new Date(d)
   const invalidDate = isNaN(dt.getTime()) || dt.getTime() === 0
   if (invalidDate && d !== undefined) {

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