diff --git a/src/comment.ts b/src/comment.ts
new file mode 100644
index 0000000..fa48de9
--- /dev/null
+++ b/src/comment.ts
@@ -0,0 +1,15 @@
+export default class Comment {
+  content: string;
+
+  constructor(content: string) {
+    this.content = content
+  }
+
+  merge(other: Comment): Comment {
+    return new Comment(`${this} ${other}`)
+  }
+
+  toString(): string {
+    return this.content
+  }
+}
diff --git a/src/cr/calendar-round.ts b/src/cr/calendar-round.ts
index 01aeb25..409d8b9 100644
--- a/src/cr/calendar-round.ts
+++ b/src/cr/calendar-round.ts
@@ -7,6 +7,7 @@ import NumberCoefficient from "./component/numberCoefficient";
 import {Wildcard} from "../wildcard";
 import WildcardCoefficient from "./component/wildcardCoefficient";
 import IPart from "../i-part";
+import Comment from '../comment';
 
 /** @ignore */
 const singleton: { [key: string]: CalendarRound } = {};
@@ -37,6 +38,7 @@ export function getCalendarRound(
 export class CalendarRound implements IPart {
   tzolkin: Tzolkin;
   haab: Haab;
+  comment: Comment | undefined;
 
   constructor(tzolkin: Tzolkin, haab: Haab) {
     /**
@@ -50,7 +52,7 @@ export class CalendarRound implements IPart {
 
     this.validate();
   }
-
+  
   /**
    * Validate that the Calendar Round has a correct 260-day and Haab
    * configuration
diff --git a/src/cr/haab.ts b/src/cr/haab.ts
index da7c771..6a21f39 100644
--- a/src/cr/haab.ts
+++ b/src/cr/haab.ts
@@ -5,6 +5,7 @@ import NumberCoefficient from "./component/numberCoefficient";
 import {coefficientParser as _} from "./component/coefficient";
 import ICoefficient from "./component/iCoefficient";
 import IPart from "../i-part";
+import Comment from "../comment";
 
 const singleton: { [key: string]: Haab } = {};
 
@@ -37,6 +38,7 @@ export function getHaab(coeff: ICoefficient, month: Wildcard | HaabMonth): Haab
 export class Haab implements IPart {
   coeff: ICoefficient;
   month: Wildcard | HaabMonth;
+  comment: Comment | undefined;
   _privateNext: null | Haab;
 
   /**
diff --git a/src/cr/tzolkin.ts b/src/cr/tzolkin.ts
index 0b1d265..d08d546 100644
--- a/src/cr/tzolkin.ts
+++ b/src/cr/tzolkin.ts
@@ -5,6 +5,7 @@ import NumberCoefficient from "./component/numberCoefficient";
 import WildcardCoefficient from "./component/wildcardCoefficient";
 import ICoefficient from "./component/iCoefficient"
 import IPart from "../i-part";
+import Comment from "../comment";
 
 const singleton: { [key: string]: Tzolkin } = {};
 
@@ -36,6 +37,7 @@ export function getTzolkin(coeff: ICoefficient, day: TzolkinDay | Wildcard): Tzo
 export class Tzolkin implements IPart {
   day: TzolkinDay | Wildcard;
   coeff: ICoefficient;
+  comment: Comment | undefined;
   _privateNext: Tzolkin | null;
 
   /**
diff --git a/src/full-date.ts b/src/full-date.ts
index 0178e08..0d8fcfe 100644
--- a/src/full-date.ts
+++ b/src/full-date.ts
@@ -4,11 +4,13 @@
 import LongCount from "./lc/long-count";
 import {CalendarRound} from "./cr/calendar-round";
 import IPart from "./i-part";
+import Comment from "./comment";
 
 export default class FullDate implements IPart {
 
   cr: CalendarRound;
   lc: LongCount;
+  comment: Comment | undefined;
 
   constructor(cr: CalendarRound, lc: LongCount) {
     this.cr = cr;
diff --git a/src/i-part.ts b/src/i-part.ts
index 6dab847..74a3313 100644
--- a/src/i-part.ts
+++ b/src/i-part.ts
@@ -1,3 +1,7 @@
+import Comment from "./comment";
+
 export default interface IPart {
+  comment: Comment | undefined;
+
   equal(other: IPart): boolean;
 }
diff --git a/src/lc/distance-number.ts b/src/lc/distance-number.ts
index 046edb5..49a4cf9 100644
--- a/src/lc/distance-number.ts
+++ b/src/lc/distance-number.ts
@@ -5,11 +5,13 @@ import {isWildcard, Wildcard} from "../wildcard";
 import LongcountAddition from "../operations/longcount-addition";
 import LongcountSubtraction from "../operations/longcount-subtraction";
 import IPart from "../i-part";
+import Comment from "../comment";
 
 export default class DistanceNumber implements IPart {
   parts: (number | Wildcard)[];
   datePattern: RegExp;
   sign: number;
+  comment: Comment | undefined
 
   /**
    * @param {...number|Wildcard} cycles - Components in the long count
diff --git a/src/operations/calendar-round-wildcard.ts b/src/operations/calendar-round-wildcard.ts
index ee11f8b..86576ee 100644
--- a/src/operations/calendar-round-wildcard.ts
+++ b/src/operations/calendar-round-wildcard.ts
@@ -1,6 +1,7 @@
 import CalendarRoundIterator from './calendar-round-iter';
 import {CalendarRound} from "../cr/calendar-round";
 import IPart from "../i-part";
+import Comment from '../comment';
 
 /**
  * A reusable singleton instance of the CalendarRoundIterator
@@ -15,6 +16,7 @@ const iter = new CalendarRoundIterator();
  */
 export default class CalendarRoundWildcard implements IPart {
   private cr: CalendarRound;
+  comment: Comment | undefined;
 
   /**
    * @param {CalendarRound} cr
diff --git a/src/operations/fulldate-wildcard.ts b/src/operations/fulldate-wildcard.ts
index a252d4c..886ea63 100644
--- a/src/operations/fulldate-wildcard.ts
+++ b/src/operations/fulldate-wildcard.ts
@@ -1,6 +1,7 @@
 import FullDate from '../full-date';
 import LongCountWildcard from './longcount-wildcard';
 import IPart from "../i-part";
+import Comment from '../comment';
 
 /** @ignore */
 // const concat = (x, y) => x.concat(y);
@@ -20,6 +21,7 @@ import IPart from "../i-part";
  */
 export default class FullDateWildcard implements IPart {
   private fullDate: FullDate;
+  comment: Comment | undefined;
 
   /**
    * @param {FullDate} partialDate
diff --git a/src/operations/longcount-addition.ts b/src/operations/longcount-addition.ts
index 9048749..c892259 100644
--- a/src/operations/longcount-addition.ts
+++ b/src/operations/longcount-addition.ts
@@ -5,11 +5,13 @@ import LongCount from "../lc/long-count";
 import ILongcount from "./ILongcount";
 import DistanceNumber from "../lc/distance-number";
 import IPart from "../i-part";
+import Comment from "../comment";
 
 export default class LongcountAddition implements IPart {
   private a: DistanceNumber;
   private b: DistanceNumber
   private LcClass: ILongcount;
+  comment: Comment | undefined;
 
   /**
    * @param {object} lcClass - Special param to pass the LongCount class into this operator to
diff --git a/src/operations/longcount-subtraction.ts b/src/operations/longcount-subtraction.ts
index 5c2b4fe..0c4fab7 100644
--- a/src/operations/longcount-subtraction.ts
+++ b/src/operations/longcount-subtraction.ts
@@ -5,11 +5,13 @@ import ILongcount from "./ILongcount";
 import LongCount from "../lc/long-count";
 import DistanceNumber from "../lc/distance-number";
 import IPart from "../i-part";
+import Comment from "../comment";
 
 export default class LongcountSubtraction implements IPart {
   private a: DistanceNumber
   private b: DistanceNumber
   private LcClass: ILongcount
+  comment: Comment | undefined;
 
   /**
    * @param {object} lcClass - Special param to pass the LongCount class into this operator to
diff --git a/src/operations/longcount-wildcard.ts b/src/operations/longcount-wildcard.ts
index 4c2ae29..7dbbe95 100644
--- a/src/operations/longcount-wildcard.ts
+++ b/src/operations/longcount-wildcard.ts
@@ -1,5 +1,6 @@
 import LongCount from "../lc/long-count";
 import IPart from "../i-part";
+import Comment from "../comment";
 
 /**
  * Given a Long Count with a wildcard, calculate all possible matching fully
@@ -7,6 +8,7 @@ import IPart from "../i-part";
  */
 export default class LongCountWildcard implements IPart {
   private lc: LongCount;
+  comment: Comment | undefined;
 
   /**
    * @param {LongCount} lc
diff --git a/src/wildcard.ts b/src/wildcard.ts
index 83e2f85..b1b2946 100644
--- a/src/wildcard.ts
+++ b/src/wildcard.ts
@@ -9,8 +9,10 @@
  * > true
  */
 import IPart from "./i-part";
+import Comment from "./comment";
 
 export class Wildcard implements IPart {
+  comment: Comment | undefined;
   /**
    * Represent the Wildcard as a string. ie, '*'.
    * @returns {string}