diff --git a/CHANGELOG.md b/CHANGELOG.md
index c490402..ca7767e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # deverything
 
+## 0.50.0
+
+### Minor Changes
+
+- dates
+
 ## 0.49.0
 
 ### Minor Changes
diff --git a/README.md b/README.md
index d13f000..5010e83 100644
--- a/README.md
+++ b/README.md
@@ -52,6 +52,15 @@ Contributions always welcome!
 - `isURL()`
 - `isUUID()` if it's a valid UUID
 
+### Dates
+
+- `isOver18()`
+- `startOfNextMonth()`
+- `startOfNextWeek()`
+- `startOfThisWeek()`
+- `startOfToday()`
+- `startOfTomorrow()`
+
 ### Math
 
 - `average()`
diff --git a/package.json b/package.json
index e7c2e15..6894d99 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "deverything",
-  "version": "0.49.0",
+  "version": "0.50.0",
   "description": "Everything you need for Dev",
   "main": "./dist/index.js",
   "module": "./dist/index.mjs",
diff --git a/src/dates/index.ts b/src/dates/index.ts
new file mode 100644
index 0000000..401ff3c
--- /dev/null
+++ b/src/dates/index.ts
@@ -0,0 +1,6 @@
+export * from "./isOver18";
+export * from "./startOfNextMonth";
+export * from "./startOfNextWeek";
+export * from "./startOfThisWeek";
+export * from "./startOfToday";
+export * from "./startOfTomorrow";
diff --git a/src/dates/isOver18.ts b/src/dates/isOver18.ts
new file mode 100644
index 0000000..ed5f8ac
--- /dev/null
+++ b/src/dates/isOver18.ts
@@ -0,0 +1,21 @@
+import { parseDate } from "../helpers";
+import { DateLike } from "../types";
+
+export const isOver18 = (birthDate: DateLike) => {
+  const now = new Date();
+  const birth = parseDate(birthDate);
+  if (!birth) return false;
+
+  const age = now.getFullYear() - birth.getFullYear();
+  if (age > 18) return true;
+  if (age < 18) return false;
+  if (age === 18) {
+    if (now.getMonth() > birth.getMonth()) return true;
+    if (now.getMonth() < birth.getMonth()) return false;
+    if (now.getMonth() === birth.getMonth()) {
+      if (now.getDate() >= birth.getDate()) return true;
+      if (now.getDate() < birth.getDate()) return false;
+    }
+  }
+  return false;
+};
diff --git a/src/dates/startOfNextMonth.ts b/src/dates/startOfNextMonth.ts
new file mode 100644
index 0000000..e5277b6
--- /dev/null
+++ b/src/dates/startOfNextMonth.ts
@@ -0,0 +1,4 @@
+export const startOfNextMonth = () => {
+  const now = new Date();
+  return new Date(now.getFullYear(), now.getMonth() + 1, 1);
+};
diff --git a/src/dates/startOfNextWeek.ts b/src/dates/startOfNextWeek.ts
new file mode 100644
index 0000000..c3f977d
--- /dev/null
+++ b/src/dates/startOfNextWeek.ts
@@ -0,0 +1,8 @@
+export const startOfNextWeek = () => {
+  const now = new Date();
+  return new Date(
+    now.getFullYear(),
+    now.getMonth(),
+    now.getDate() + 7 - now.getDay()
+  );
+};
diff --git a/src/dates/startOfThisWeek.ts b/src/dates/startOfThisWeek.ts
new file mode 100644
index 0000000..adf2b41
--- /dev/null
+++ b/src/dates/startOfThisWeek.ts
@@ -0,0 +1,8 @@
+export const startOfThisWeek = () => {
+  const now = new Date();
+  return new Date(
+    now.getFullYear(),
+    now.getMonth(),
+    now.getDate() - now.getDay()
+  );
+};
diff --git a/src/dates/startOfToday.ts b/src/dates/startOfToday.ts
new file mode 100644
index 0000000..bc78965
--- /dev/null
+++ b/src/dates/startOfToday.ts
@@ -0,0 +1,4 @@
+export const startOfToday = () => {
+  const now = new Date();
+  return new Date(now.getFullYear(), now.getMonth(), now.getDate());
+};
diff --git a/src/dates/startOfTomorrow.ts b/src/dates/startOfTomorrow.ts
new file mode 100644
index 0000000..76077ab
--- /dev/null
+++ b/src/dates/startOfTomorrow.ts
@@ -0,0 +1,4 @@
+export const startOfTomorrow = () => {
+  const now = new Date();
+  return new Date(now.getFullYear(), now.getMonth(), now.getDate() + 1);
+};
diff --git a/src/index.ts b/src/index.ts
index 742819e..e75f2bf 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,4 +1,5 @@
 export * from "./checks";
+export * from "./dates";
 export * from "./formatters";
 export * from "./helpers";
 export * from "./math";
diff --git a/src/types/Date.ts b/src/types/Date.ts
index b2d1fb0..ea6e726 100644
--- a/src/types/Date.ts
+++ b/src/types/Date.ts
@@ -1,6 +1,8 @@
 export type DateLike = Date | string | number;
 export type Datey = Date | string;
 
+export type ISODate = string;
+
 export type DateRange = {
   startDate: DateLike;
   endDate: DateLike;
diff --git a/src/types/HashMap.ts b/src/types/HashMap.ts
index edc33d3..9314b8d 100644
--- a/src/types/HashMap.ts
+++ b/src/types/HashMap.ts
@@ -1,7 +1,7 @@
 import { PlainKey } from "./Object";
 
 // I don't like the Dict keyword, but it's a possibility...
-export type HashMap<T> = Record<PlainKey, T>;
+export type HashMap<T = any> = Record<PlainKey, T>;
 export type NumberMap = Record<PlainKey, number>;
 export type StringMap = Record<PlainKey, string>;
 export type BoolMap = Record<PlainKey, boolean>;