Replace DateEncoding with own impl

[987Nabil]

[jdegoes]

/bounty $150

[algora-pbc[bot]]

💎 $150 bounty • ZIO

Steps to solve:

1. Start working: Comment /attempt #3527 with your implementation plan
2. Submit work: Create a pull request including /claim #3527 in the PR body to claim the bounty
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Attempt	Started (UTC)	Solution	Actions
🟢 @987Nabil	Jun 14, 2025, 07:15:13 AM	#3550	Reward

[rajj28]

/attempt #3550

[algora-pbc[bot]]

🎉🎈 @987Nabil has been awarded $150 by ZIO! 🎈🎊