diff --git a/telegram-bot-api/Client.cpp b/telegram-bot-api/Client.cpp
index 944905e..a44a894 100644
--- a/telegram-bot-api/Client.cpp
+++ b/telegram-bot-api/Client.cpp
@@ -580,9 +580,54 @@ class Client::JsonEntity final : public td::Jsonable {
       case td_api::textEntityTypeExpandableBlockQuote::ID:
         object("type", "expandable_blockquote");
         break;
-      case td_api::textEntityTypeDateTime::ID:
+      case td_api::textEntityTypeDateTime::ID: {
+        auto entity = static_cast<const td_api::textEntityTypeDateTime *>(entity_->type_.get());
         object("type", "date_time");
+        object("unix_time", entity->unix_time_);
+        td::string format;
+        if (entity->formatting_type_ != nullptr) {
+          switch (entity->formatting_type_->get_id()) {
+            case td_api::dateTimeFormattingTypeRelative::ID:
+              format = "r";
+              break;
+            case td_api::dateTimeFormattingTypeAbsolute::ID: {
+              auto abs = static_cast<const td_api::dateTimeFormattingTypeAbsolute *>(entity->formatting_type_.get());
+              if (abs->show_day_of_week_) {
+                format += 'w';
+              }
+              switch (abs->date_precision_->get_id()) {
+                case td_api::dateTimePartPrecisionNone::ID:
+                  break;
+                case td_api::dateTimePartPrecisionShort::ID:
+                  format += 'd';
+                  break;
+                case td_api::dateTimePartPrecisionLong::ID:
+                  format += 'D';
+                  break;
+                default:
+                  UNREACHABLE();
+              }
+              switch (abs->time_precision_->get_id()) {
+                case td_api::dateTimePartPrecisionNone::ID:
+                  break;
+                case td_api::dateTimePartPrecisionShort::ID:
+                  format += 't';
+                  break;
+                case td_api::dateTimePartPrecisionLong::ID:
+                  format += 'T';
+                  break;
+                default:
+                  UNREACHABLE();
+              }
+              break;
+            }
+            default:
+              UNREACHABLE();
+          }
+        }
+        object("date_time_format", format);
         break;
+      }
       default:
         UNREACHABLE();
     }