ac53f128af
feat(LOY-423): Add progress bar for L6 members showing nights stayed * feat(LOY-423): Add progress bar for L6 members showing nights stayed * chore(LOY-423): shorten css selector Approved-by: Matilda Landström
15 lines
417 B
TypeScript
15 lines
417 B
TypeScript
/**
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* Calculate the tier start date from the tier expiration date.
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* The tier period is 1 year, so start date is expiration minus 1 year.
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*/
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export function getTierStartDate(
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tierExpirationDate: string | null | undefined
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): string | null {
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if (!tierExpirationDate) return null
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const date = new Date(tierExpirationDate)
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date.setFullYear(date.getFullYear() - 1)
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return date.toISOString().split("T")[0]
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}
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