diff --git a/init.lua b/init.lua
index 74f67df..2af9467 100644
--- a/init.lua
+++ b/init.lua
@@ -6,3 +6,4 @@ require('plugins')
 require('colorscheme')
 require('lsp')
 require('keybindings')
+require('diary')
diff --git a/lua/diary.lua b/lua/diary.lua
new file mode 100644
index 0000000..f58578f
--- /dev/null
+++ b/lua/diary.lua
@@ -0,0 +1,21 @@
+local diary_open = function(opts)
+  local date = opts.args ~= '' and opts.args or os.date('%Y-%m-%d')
+  local year, month = date:match('(%d%d%d%d)-(%d%d)')
+  local file = string.format('~/.diary/asciidoc/%s/diary-%s-%s.adoc', year, year, month)
+  print("file is:", file)
+  vim.cmd('e ' .. file)
+  vim.cmd('normal! G')
+
+  -- NOTE.2025-06-08 [1] and [2] should be replaced with snippet name, but I
+  -- don't know how -- neither do grok nor chatgpt ...
+  local snips = require('luasnip')
+  local asnippets = snips.get_snippets('asciidoc')
+  if vim.fn.getfsize(file) == 0 then
+    snips.snip_expand(asnippets[1])
+    vim.cmd('normal! G')
+  end
+  snips.snip_expand(asnippets[2])
+
+end
+
+vim.api.nvim_create_user_command("Diary", diary_open, { nargs = '?' })