Cheapest priced copy (The Dark): $11.99 at Card Kingdom, near mint, their price list as of .
Stone Calendar 
Artifact · Rare · The Dark · #111
Spells you cast cost {1} less to cast.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $11.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| The Dark | 111 | Rare | $11.99 | — |
2 rulings from Wizards of the Coast
- 4 October 2004Does not change the mana cost of the spell, it just reduces what you pay for it.
- 4 October 2004You may choose not to apply Stone Calendar’s cost reduction effect.