diff --git a/dist/tuicss.js b/dist/tuicss.js
index e307850..d23f509 100644
--- a/dist/tuicss.js
+++ b/dist/tuicss.js
@@ -117,7 +117,7 @@ function datetimeController() {
             // parse out the date and time into constants.
             const today  = new Date();
             const month  = (today.getMonth() + '').length === 2 ? today.getMonth() + 1 : '0' + (today.getMonth() + 1);
-            const day    = (today.getDate() + '').length === 2 ? today.getDate() + 1 : '0' + (today.getDate() + 1);
+            const day    = (today.getDate() + '').length === 2 ? today.getDate() : '0' + today.getDate();
             const dayOfWeek    = (today.getDay() + '').length === 2 ? today.getDay() + 1 : '0' + (today.getDay() + 1);
             const year   = today.getFullYear() + '';
             const hour   = (today.getHours() + '').length === 2 ? today.getHours() : '0' + today.getHours();
diff --git a/dist/tuicss.min.js b/dist/tuicss.min.js
index 44af36e..9a832dc 100644
--- a/dist/tuicss.min.js
+++ b/dist/tuicss.min.js
@@ -1 +1 @@
-function domReady(t){document.addEventListener("DOMContentLoaded",t),"interactive"!==document.readyState&&"complete"!==document.readyState||t()}function tabsController(){const t=document.getElementsByClassName("tui-tab");if(!t.length)return;for(const e of t)e.addEventListener("click",function(e){if(e.target.classList.contains("disabled"))return;for(const e of t)e.classList.remove("active");const o=document.getElementsByClassName("tui-tab-content");if(!o)throw"No tab content elements found.";for(const t of o)t.style.display="none";const n=e.target.getAttribute("data-tab-content");if(n){const t=document.getElementById(n);if(!t)throw'No tab content element with id "'+n+'" found.';t.style.display="block"}e.target.classList.add("active")});const e=document.querySelector(".tui-tab.active");e?e.click():t[0].click()}function datetimeController(){const t=document.getElementsByClassName("tui-datetime");function e(){for(const e of t){if(null===e)continue;let t=e.getAttribute("data-format");const o=new Date,n=2===(o.getMonth()+"").length?o.getMonth()+1:"0"+(o.getMonth()+1),a=2===(o.getDate()+"").length?o.getDate()+1:"0"+(o.getDate()+1),s=2===(o.getDay()+"").length?o.getDay()+1:"0"+(o.getDay()+1),c=o.getFullYear()+"",l=2===(o.getHours()+"").length?o.getHours():"0"+o.getHours(),i=(parseInt(l)+24)%"12"||"12",d=2===(o.getMinutes()+"").length?o.getMinutes():"0"+o.getMinutes(),r=2===(o.getSeconds()+"").length?o.getSeconds():"0"+o.getSeconds(),u=parseInt(l)>=12?"PM":"AM";t=(t=(t=(t=(t=(t=(t=(t=(t=t.replace("M",n)).replace("d",a)).replace("e",s)).replace("y",c)).replace("H",l)).replace("h",i)).replace("m",d)).replace("s",r)).replace("a",u),e.innerHTML=t}}t.length&&(e(),setTimeout(()=>{setInterval(e,1e3)},1e3-(new Date).getMilliseconds()))}function sidenavController(){const t=document.querySelector(".tui-sidenav-button");t&&t.addEventListener("click",()=>{const t=document.querySelector(".tui-sidenav");if(!t)throw"No sidenav element found.";t.classList.contains("active")?t.classList.remove("active"):t.classList.add("active")})}function modalController(){const t=document.querySelector(".tui-overlap");if(!t)return;const e=document.getElementsByClassName("tui-modal-button");for(const o of e)o.addEventListener("click",e=>{t.classList.add("active");const o=e.target.getAttribute("data-modal");if(!o)throw"Modal close button data-modal attribute is empty or not set.";{const t=document.getElementById(o);if(!t)throw'No modal element with id of "'+o+'" found.';t.classList.add("active")}});const o=document.getElementsByClassName("tui-modal-close-button");if(e.length>0&&!o.length)throw"No modal close buttons found.";for(const e of o)e.addEventListener("click",e=>{t.classList.remove("active");const o=e.target.getAttribute("data-modal");if(!o)throw"Modal close button data-modal attribute is empty or not set.";{const t=document.getElementById(o);if(!t)throw'No modal element with id of "'+o+'" found.';t.classList.remove("active")}})}domReady(function(){tabsController(),datetimeController(),sidenavController(),modalController()});
\ No newline at end of file
+function domReady(t){document.addEventListener("DOMContentLoaded",t),"interactive"!==document.readyState&&"complete"!==document.readyState||t()}function tabsController(){const t=document.getElementsByClassName("tui-tab");if(!t.length)return;for(const e of t)e.addEventListener("click",function(e){if(e.target.classList.contains("disabled"))return;for(const e of t)e.classList.remove("active");const o=document.getElementsByClassName("tui-tab-content");if(!o)throw"No tab content elements found.";for(const t of o)t.style.display="none";const n=e.target.getAttribute("data-tab-content");if(n){const t=document.getElementById(n);if(!t)throw'No tab content element with id "'+n+'" found.';t.style.display="block"}e.target.classList.add("active")});const e=document.querySelector(".tui-tab.active");e?e.click():t[0].click()}function datetimeController(){const t=document.getElementsByClassName("tui-datetime");function e(){for(const e of t){if(null===e)continue;let t=e.getAttribute("data-format");const o=new Date,n=2===(o.getMonth()+"").length?o.getMonth()+1:"0"+(o.getMonth()+1),a=2===(o.getDate()+"").length?o.getDate():"0"+o.getDate(),s=2===(o.getDay()+"").length?o.getDay()+1:"0"+(o.getDay()+1),c=o.getFullYear()+"",l=2===(o.getHours()+"").length?o.getHours():"0"+o.getHours(),i=(parseInt(l)+24)%"12"||"12",d=2===(o.getMinutes()+"").length?o.getMinutes():"0"+o.getMinutes(),r=2===(o.getSeconds()+"").length?o.getSeconds():"0"+o.getSeconds(),u=parseInt(l)>=12?"PM":"AM";t=(t=(t=(t=(t=(t=(t=(t=(t=t.replace("M",n)).replace("d",a)).replace("e",s)).replace("y",c)).replace("H",l)).replace("h",i)).replace("m",d)).replace("s",r)).replace("a",u),e.innerHTML=t}}t.length&&(e(),setTimeout(()=>{setInterval(e,1e3)},1e3-(new Date).getMilliseconds()))}function sidenavController(){const t=document.querySelector(".tui-sidenav-button");t&&t.addEventListener("click",()=>{const t=document.querySelector(".tui-sidenav");if(!t)throw"No sidenav element found.";t.classList.contains("active")?t.classList.remove("active"):t.classList.add("active")})}function modalController(){const t=document.querySelector(".tui-overlap");if(!t)return;const e=document.getElementsByClassName("tui-modal-button");for(const o of e)o.addEventListener("click",e=>{t.classList.add("active");const o=e.target.getAttribute("data-modal");if(!o)throw"Modal close button data-modal attribute is empty or not set.";{const t=document.getElementById(o);if(!t)throw'No modal element with id of "'+o+'" found.';t.classList.add("active")}});const o=document.getElementsByClassName("tui-modal-close-button");if(e.length>0&&!o.length)throw"No modal close buttons found.";for(const e of o)e.addEventListener("click",e=>{t.classList.remove("active");const o=e.target.getAttribute("data-modal");if(!o)throw"Modal close button data-modal attribute is empty or not set.";{const t=document.getElementById(o);if(!t)throw'No modal element with id of "'+o+'" found.';t.classList.remove("active")}})}domReady(function(){tabsController(),datetimeController(),sidenavController(),modalController()});
\ No newline at end of file
diff --git a/src/js/tuicss.js b/src/js/tuicss.js
index e307850..d23f509 100644
--- a/src/js/tuicss.js
+++ b/src/js/tuicss.js
@@ -117,7 +117,7 @@ function datetimeController() {
             // parse out the date and time into constants.
             const today  = new Date();
             const month  = (today.getMonth() + '').length === 2 ? today.getMonth() + 1 : '0' + (today.getMonth() + 1);
-            const day    = (today.getDate() + '').length === 2 ? today.getDate() + 1 : '0' + (today.getDate() + 1);
+            const day    = (today.getDate() + '').length === 2 ? today.getDate() : '0' + today.getDate();
             const dayOfWeek    = (today.getDay() + '').length === 2 ? today.getDay() + 1 : '0' + (today.getDay() + 1);
             const year   = today.getFullYear() + '';
             const hour   = (today.getHours() + '').length === 2 ? today.getHours() : '0' + today.getHours();