Ring with rotation and lock function to display multiple anniversaries

A ring with a rotation and a lock function to display multiple anniversaries, the ring comprising:

• a main ring including engagement areas that engagement grooves are positioned on and distant areas positioned between the engagement areas;
• a sub-ring engaged with the main ring in a rotatable and fixable way, and
• engagement members positioned between the main ring and the sub-ring,
• wherein the sub-ring includes a receiver that receives an engagement member;
• wherein the receiver includes a first side, a second side facing the first side and connected to an opening area, a third and a fourth side respectively connecting between the first and the second side;
• wherein a length of the opening area in a first direction is shorter than a length of the first side in the first direction;
• wherein the engagement member is made of materials having elasticity and positioned in the receiver;
• wherein when the opening area is aligned with an engagement groove area, a portion of the engagement member is protruded from the receiver outwardly and engaged with an engagement groove;
• wherein when the opening area is aligned with a distant area, the portion of the engagement member is inserted in the receiver.