diff --git a/day_generator.dart b/day_generator.dart
index 8498e58..a6b9ae8 100644
--- a/day_generator.dart
+++ b/day_generator.dart
@@ -1,12 +1,16 @@
 import 'dart:async';
 import 'dart:io';
 
+import 'package:meta/meta.dart';
+
 import 'tool/session_token.dart';
 
+const year = '2024';
+
 /// Small Program to be used to generate files and boilerplate for a given day.\
 /// Call with `dart run day_generator.dart <day>`
+/// If no day is given, the user will be prompted to enter one, with the current AOC day suggested if applicable.
 void main(List<String?> args) async {
-  const year = '2023';
   final session = getSessionToken();
 
   if (args.length > 1) {
@@ -18,15 +22,12 @@ void main(List<String?> args) async {
 
   // input through terminal
   if (args.isEmpty) {
-    print('Please enter a day for which to generate files');
-    final input = stdin.readLineSync();
-    if (input == null) {
-      print('No input given, exiting');
+    final day = _promptDay();
+    if (day == null) {
+      print('No day given, exiting');
       return;
     }
-    // pad day number to have 2 digits
-    dayNumber = int.parse(input).toString().padLeft(2, '0');
-    // input from CLI call
+    dayNumber = day;
   } else {
     dayNumber = int.parse(args[0]!).toString().padLeft(2, '0');
   }
@@ -98,6 +99,38 @@ You can do so by deleting the file at $sessionTokenPath and restarting the gener
   print('All set, Good luck!');
 }
 
+/// Prompts the user to enter a day for which to generate files.
+/// If the current day is during the advent of code period, it will be suggested.
+String? _promptDay() {
+  final currentDay = getCurrentAocDay();
+  var prompt = 'Please enter a day for which to generate files';
+  String? defaultDay;
+  if (currentDay != null) {
+    defaultDay = currentDay.toString().padLeft(2, '0');
+    prompt += ' ($defaultDay)';
+  }
+  print(prompt);
+  final input = stdin.readLineSync();
+  if (input == null || input.isEmpty) {
+    return defaultDay;
+  } else {
+    return int.parse(input).toString().padLeft(2, '0');
+  }
+}
+
+/// Returns the current day of the advent of code calendar, if there is one.
+/// The AOC days start at midnight EST from December 1st to December 25th.
+@visibleForTesting
+int? getCurrentAocDay([DateTime? now]) {
+  final startDay = DateTime.parse('$year-12-01T05:00:00Z');
+  final endDay = DateTime.parse('$year-12-26T05:00:00Z');
+  now ??= DateTime.now().toUtc();
+  if (now.isAfter(startDay) && now.isBefore(endDay)) {
+    return now.difference(startDay).inDays + 1;
+  }
+  return null;
+}
+
 String _dayTemplate(String dayNumber) {
   return '''
 import '../utils/index.dart';
diff --git a/pubspec.lock b/pubspec.lock
index 564642e..4dec22a 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -5,90 +5,95 @@ packages:
     dependency: transitive
     description:
       name: _fe_analyzer_shared
-      sha256: "36a321c3d2cbe01cbcb3540a87b8843846e0206df3e691fa7b23e19e78de6d49"
+      sha256: "45cfa8471b89fb6643fe9bf51bd7931a76b8f5ec2d65de4fb176dba8d4f22c77"
       url: "https://pub.dev"
     source: hosted
-    version: "65.0.0"
+    version: "73.0.0"
+  _macros:
+    dependency: transitive
+    description: dart
+    source: sdk
+    version: "0.3.2"
   analyzer:
     dependency: transitive
     description:
       name: analyzer
-      sha256: dfe03b90ec022450e22513b5e5ca1f01c0c01de9c3fba2f7fd233cb57a6b9a07
+      sha256: "4959fec185fe70cce007c57e9ab6983101dbe593d2bf8bbfb4453aaec0cf470a"
       url: "https://pub.dev"
     source: hosted
-    version: "6.3.0"
+    version: "6.8.0"
   args:
     dependency: transitive
     description:
       name: args
-      sha256: eef6c46b622e0494a36c5a12d10d77fb4e855501a91c1b9ef9339326e58f0596
+      sha256: bf9f5caeea8d8fe6721a9c358dd8a5c1947b27f1cfaa18b39c301273594919e6
       url: "https://pub.dev"
     source: hosted
-    version: "2.4.2"
+    version: "2.6.0"
   async:
     dependency: transitive
     description:
       name: async
-      sha256: "947bfcf187f74dbc5e146c9eb9c0f10c9f8b30743e341481c1e2ed3ecc18c20c"
+      sha256: d2872f9c19731c2e5f10444b14686eb7cc85c76274bd6c16e1816bff9a3bab63
       url: "https://pub.dev"
     source: hosted
-    version: "2.11.0"
+    version: "2.12.0"
   boolean_selector:
     dependency: transitive
     description:
       name: boolean_selector
-      sha256: "6cfb5af12253eaf2b368f07bacc5a80d1301a071c73360d746b7f2e32d762c66"
+      sha256: "8aab1771e1243a5063b8b0ff68042d67334e3feab9e95b9490f9a6ebf73b42ea"
       url: "https://pub.dev"
     source: hosted
-    version: "2.1.1"
+    version: "2.1.2"
   collection:
     dependency: "direct main"
     description:
       name: collection
-      sha256: ee67cb0715911d28db6bf4af1026078bd6f0128b07a5f66fb2ed94ec6783c09a
+      sha256: "2f5709ae4d3d59dd8f7cd309b4e023046b57d8a6c82130785d2b0e5868084e76"
       url: "https://pub.dev"
     source: hosted
-    version: "1.18.0"
+    version: "1.19.1"
   convert:
     dependency: transitive
     description:
       name: convert
-      sha256: "0f08b14755d163f6e2134cb58222dd25ea2a2ee8a195e53983d57c075324d592"
+      sha256: b30acd5944035672bc15c6b7a8b47d773e41e2f17de064350988c5d02adb1c68
       url: "https://pub.dev"
     source: hosted
-    version: "3.1.1"
+    version: "3.1.2"
   coverage:
     dependency: transitive
     description:
       name: coverage
-      sha256: "595a29b55ce82d53398e1bcc2cba525d7bd7c59faeb2d2540e9d42c390cfeeeb"
+      sha256: "4b03e11f6d5b8f6e5bb5e9f7889a56fe6c5cbe942da5378ea4d4d7f73ef9dfe5"
       url: "https://pub.dev"
     source: hosted
-    version: "1.6.4"
+    version: "1.11.0"
   crypto:
     dependency: transitive
     description:
       name: crypto
-      sha256: ff625774173754681d66daaf4a448684fb04b78f902da9cb3d308c19cc5e8bab
+      sha256: "1e445881f28f22d6140f181e07737b22f1e099a5e1ff94b0af2f9e4a463f4855"
       url: "https://pub.dev"
     source: hosted
-    version: "3.0.3"
+    version: "3.0.6"
   file:
     dependency: transitive
     description:
       name: file
-      sha256: "1b92bec4fc2a72f59a8e15af5f52cd441e4a7860b49499d69dfa817af20e925d"
+      sha256: a3b4f84adafef897088c160faf7dfffb7696046cb13ae90b508c2cbc95d3b8d4
       url: "https://pub.dev"
     source: hosted
-    version: "6.1.4"
+    version: "7.0.1"
   frontend_server_client:
     dependency: transitive
     description:
       name: frontend_server_client
-      sha256: "408e3ca148b31c20282ad6f37ebfa6f4bdc8fede5b74bc2f08d9d92b55db3612"
+      sha256: f64a0333a82f30b0cca061bc3d143813a486dc086b574bfb233b7c1372427694
       url: "https://pub.dev"
     source: hosted
-    version: "3.2.0"
+    version: "4.0.0"
   glob:
     dependency: transitive
     description:
@@ -109,10 +114,10 @@ packages:
     dependency: transitive
     description:
       name: http_parser
-      sha256: "2aa08ce0341cc9b354a498388e30986515406668dbcc4f7c950c3e715496693b"
+      sha256: "76d306a1c3afb33fe82e2bbacad62a61f409b5634c915fceb0d799de1a913360"
       url: "https://pub.dev"
     source: hosted
-    version: "4.0.2"
+    version: "4.1.1"
   io:
     dependency: transitive
     description:
@@ -125,50 +130,58 @@ packages:
     dependency: transitive
     description:
       name: js
-      sha256: f2c445dce49627136094980615a031419f7f3eb393237e4ecd97ac15dea343f3
+      sha256: c1b2e9b5ea78c45e1a0788d29606ba27dc5f71f019f32ca5140f61ef071838cf
       url: "https://pub.dev"
     source: hosted
-    version: "0.6.7"
+    version: "0.7.1"
   json_annotation:
     dependency: transitive
     description:
       name: json_annotation
-      sha256: b10a7b2ff83d83c777edba3c6a0f97045ddadd56c944e1a23a3fdf43a1bf4467
+      sha256: "1ce844379ca14835a50d2f019a3099f419082cfdd231cd86a142af94dd5c6bb1"
       url: "https://pub.dev"
     source: hosted
-    version: "4.8.1"
+    version: "4.9.0"
   logging:
     dependency: transitive
     description:
       name: logging
-      sha256: "623a88c9594aa774443aa3eb2d41807a48486b5613e67599fb4c41c0ad47c340"
+      sha256: c8245ada5f1717ed44271ed1c26b8ce85ca3228fd2ffdb75468ab01979309d61
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.3.0"
+  macros:
+    dependency: transitive
+    description:
+      name: macros
+      sha256: "0acaed5d6b7eab89f63350bccd82119e6c602df0f391260d0e32b5e23db79536"
       url: "https://pub.dev"
     source: hosted
-    version: "1.2.0"
+    version: "0.1.2-main.4"
   matcher:
     dependency: transitive
     description:
       name: matcher
-      sha256: "1803e76e6653768d64ed8ff2e1e67bea3ad4b923eb5c56a295c3e634bad5960e"
+      sha256: d2323aa2060500f906aa31a895b4030b6da3ebdcc5619d14ce1aada65cd161cb
       url: "https://pub.dev"
     source: hosted
-    version: "0.12.16"
+    version: "0.12.16+1"
   meta:
     dependency: "direct main"
     description:
       name: meta
-      sha256: d584fa6707a52763a52446f02cc621b077888fb63b93bbcb1143a7be5a0c0c04
+      sha256: e3641ec5d63ebf0d9b41bd43201a66e3fc79a65db5f61fc181f04cd27aab950c
       url: "https://pub.dev"
     source: hosted
-    version: "1.11.0"
+    version: "1.16.0"
   mime:
     dependency: transitive
     description:
       name: mime
-      sha256: e4ff8e8564c03f255408decd16e7899da1733852a9110a58fe6d1b817684a63e
+      sha256: "41a20518f0cb1256669420fdba0cd90d21561e560ac240f26ef8322e45bb7ed6"
       url: "https://pub.dev"
     source: hosted
-    version: "1.0.4"
+    version: "2.0.0"
   node_preamble:
     dependency: transitive
     description:
@@ -189,10 +202,10 @@ packages:
     dependency: transitive
     description:
       name: path
-      sha256: "2ad4cddff7f5cc0e2d13069f2a3f7a73ca18f66abd6f5ecf215219cdb3638edb"
+      sha256: "75cca69d1490965be98c73ceaea117e8a04dd21217b37b292c9ddbec0d955bc5"
       url: "https://pub.dev"
     source: hosted
-    version: "1.8.0"
+    version: "1.9.1"
   pool:
     dependency: transitive
     description:
@@ -213,18 +226,18 @@ packages:
     dependency: "direct main"
     description:
       name: quiver
-      sha256: b1c1ac5ce6688d77f65f3375a9abb9319b3cb32486bdc7a1e0fdf004d7ba4e47
+      sha256: ea0b925899e64ecdfbf9c7becb60d5b50e706ade44a85b2363be2a22d88117d2
       url: "https://pub.dev"
     source: hosted
-    version: "3.2.1"
+    version: "3.2.2"
   shelf:
     dependency: transitive
     description:
       name: shelf
-      sha256: ad29c505aee705f41a4d8963641f91ac4cee3c8fad5947e033390a7bd8180fa4
+      sha256: e7dd780a7ffb623c57850b33f43309312fc863fb6aa3d276a754bb299839ef12
       url: "https://pub.dev"
     source: hosted
-    version: "1.4.1"
+    version: "1.4.2"
   shelf_packages_handler:
     dependency: transitive
     description:
@@ -237,26 +250,26 @@ packages:
     dependency: transitive
     description:
       name: shelf_static
-      sha256: a41d3f53c4adf0f57480578c1d61d90342cd617de7fc8077b1304643c2d85c1e
+      sha256: c87c3875f91262785dade62d135760c2c69cb217ac759485334c5857ad89f6e3
       url: "https://pub.dev"
     source: hosted
-    version: "1.1.2"
+    version: "1.1.3"
   shelf_web_socket:
     dependency: transitive
     description:
       name: shelf_web_socket
-      sha256: "9ca081be41c60190ebcb4766b2486a7d50261db7bd0f5d9615f2d653637a84c1"
+      sha256: cc36c297b52866d203dbf9332263c94becc2fe0ceaa9681d07b6ef9807023b67
       url: "https://pub.dev"
     source: hosted
-    version: "1.0.4"
+    version: "2.0.1"
   source_map_stack_trace:
     dependency: transitive
     description:
       name: source_map_stack_trace
-      sha256: "84cf769ad83aa6bb61e0aa5a18e53aea683395f196a6f39c4c881fb90ed4f7ae"
+      sha256: c0713a43e323c3302c2abe2a1cc89aa057a387101ebd280371d6a6c9fa68516b
       url: "https://pub.dev"
     source: hosted
-    version: "2.1.1"
+    version: "2.1.2"
   source_maps:
     dependency: transitive
     description:
@@ -277,10 +290,10 @@ packages:
     dependency: transitive
     description:
       name: stack_trace
-      sha256: f8d9f247e2f9f90e32d1495ff32dac7e4ae34ffa7194c5ff8fcc0fd0e52df774
+      sha256: "9f47fd3630d76be3ab26f0ee06d213679aa425996925ff3feffdec504931c377"
       url: "https://pub.dev"
     source: hosted
-    version: "1.10.0"
+    version: "1.12.0"
   stream_channel:
     dependency: transitive
     description:
@@ -293,10 +306,10 @@ packages:
     dependency: transitive
     description:
       name: string_scanner
-      sha256: "556692adab6cfa87322a115640c11f13cb77b3f076ddcc5d6ae3c20242bedcde"
+      sha256: "0bd04f5bb74fcd6ff0606a888a30e917af9bd52820b178eaa464beb11dca84b6"
       url: "https://pub.dev"
     source: hosted
-    version: "1.2.0"
+    version: "1.4.0"
   term_glyph:
     dependency: transitive
     description:
@@ -309,26 +322,26 @@ packages:
     dependency: "direct main"
     description:
       name: test
-      sha256: a1f7595805820fcc05e5c52e3a231aedd0b72972cb333e8c738a8b1239448b6f
+      sha256: f2a018e2baa6fce7c8daa55b8bdf4b3d7d165f82caac269e4cbe5edd666c0e4c
       url: "https://pub.dev"
     source: hosted
-    version: "1.24.9"
+    version: "1.25.9"
   test_api:
     dependency: transitive
     description:
       name: test_api
-      sha256: "5c2f730018264d276c20e4f1503fd1308dfbbae39ec8ee63c5236311ac06954b"
+      sha256: fb31f383e2ee25fbbfe06b40fe21e1e458d14080e3c67e7ba0acfde4df4e0bbd
       url: "https://pub.dev"
     source: hosted
-    version: "0.6.1"
+    version: "0.7.4"
   test_core:
     dependency: transitive
     description:
       name: test_core
-      sha256: a757b14fc47507060a162cc2530d9a4a2f92f5100a952c7443b5cad5ef5b106a
+      sha256: "60ff490bb383858015df7b7a0d883301a426edf9033989f55f091d91efb9dfaf"
       url: "https://pub.dev"
     source: hosted
-    version: "0.5.9"
+    version: "0.6.6"
   timing:
     dependency: "direct main"
     description:
@@ -341,10 +354,10 @@ packages:
     dependency: transitive
     description:
       name: typed_data
-      sha256: facc8d6582f16042dd49f2463ff1bd6e2c9ef9f3d5da3d9b087e244a7b564b3c
+      sha256: f9049c039ebfeb4cf7a7104a675823cd72dba8297f264b6637062516699fa006
       url: "https://pub.dev"
     source: hosted
-    version: "1.3.2"
+    version: "1.4.0"
   very_good_analysis:
     dependency: "direct main"
     description:
@@ -357,10 +370,10 @@ packages:
     dependency: transitive
     description:
       name: vm_service
-      sha256: c538be99af830f478718b51630ec1b6bee5e74e52c8a802d328d9e71d35d2583
+      sha256: "0968250880a6c5fe7edc067ed0a13d4bae1577fe2771dcf3010d52c4a9d3ca14"
       url: "https://pub.dev"
     source: hosted
-    version: "11.10.0"
+    version: "14.3.1"
   watcher:
     dependency: transitive
     description:
@@ -369,14 +382,30 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.1.0"
+  web:
+    dependency: transitive
+    description:
+      name: web
+      sha256: cd3543bd5798f6ad290ea73d210f423502e71900302dde696f8bff84bf89a1cb
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.0"
+  web_socket:
+    dependency: transitive
+    description:
+      name: web_socket
+      sha256: "3c12d96c0c9a4eec095246debcea7b86c0324f22df69893d538fcc6f1b8cce83"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.1.6"
   web_socket_channel:
     dependency: transitive
     description:
       name: web_socket_channel
-      sha256: d88238e5eac9a42bb43ca4e721edba3c08c6354d4a53063afaa568516217621b
+      sha256: "9f187088ed104edd8662ca07af4b124465893caf063ba29758f97af57e61da8f"
       url: "https://pub.dev"
     source: hosted
-    version: "2.4.0"
+    version: "3.0.1"
   webkit_inspection_protocol:
     dependency: transitive
     description:
@@ -394,4 +423,4 @@ packages:
     source: hosted
     version: "3.1.2"
 sdks:
-  dart: ">=3.0.0 <4.0.0"
+  dart: ">=3.5.0 <4.0.0"
diff --git a/pubspec.yaml b/pubspec.yaml
index 634e439..df6c774 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -3,10 +3,11 @@ version: 1.0.0
 
 environment:
   sdk: ">=3.0.0 <4.0.0"
+
 dependencies:
   collection: ^1.18.0
   meta: ^1.11.0
   quiver: ^3.2.1
-  test: ^1.24.9
+  test: ^1.25.9
   timing: ^1.0.1
-  very_good_analysis: ^5.1.0
+  very_good_analysis: ^5.1.0
\ No newline at end of file
diff --git a/test/day_generator_test.dart b/test/day_generator_test.dart
new file mode 100644
index 0000000..be5bdc6
--- /dev/null
+++ b/test/day_generator_test.dart
@@ -0,0 +1,44 @@
+import 'package:test/test.dart';
+
+import '../day_generator.dart';
+
+void main() {
+  group('DayGenerator', () {
+    group('getCurrentAocDay', () {
+      test('should return the current day during the aoc period', () {
+        // noon December 1st CET
+        final now = DateTime.parse('2024-12-08T12:00:00+0100');
+
+        final result = getCurrentAocDay(now);
+
+        expect(result, 8);
+      });
+
+      test('should return null if the current day is before the aoc period',
+          () {
+        // noon November 30th CET
+        final dayBefore = DateTime.parse('2024-11-30T12:00:00+0100');
+        final rightBeforeStart = DateTime.parse('2024-11-30T23:59:00-0500');
+
+        expect(getCurrentAocDay(dayBefore), null);
+        expect(getCurrentAocDay(rightBeforeStart), null);
+      });
+
+      test('should return 1 if the current day is the first day of aoc', () {
+        final rightAfterStart = DateTime.parse('2024-12-01T00:01:00-0500');
+        final rightBeforeNextDay = DateTime.parse('2024-12-01T23:59:00-0500');
+
+        expect(getCurrentAocDay(rightAfterStart), 1);
+        expect(getCurrentAocDay(rightBeforeNextDay), 1);
+      });
+
+      test('should return 25 if the current day is the last day of aoc', () {
+        final rightAfterEnd = DateTime.parse('2024-12-25T00:01:00-0500');
+        final dayAfterEnd = DateTime.parse('2024-12-26T00:01:00-0500');
+
+        expect(getCurrentAocDay(rightAfterEnd), 25);
+        expect(getCurrentAocDay(dayAfterEnd), null);
+      });
+    });
+  });
+}