Get the Ethereum block number at a given date.

block_from_timestamp.js

const axios = require('axios');
const SUBGRAPH_ETH_BLOCKS = 'https://api.thegraph.com/subgraphs/name/blocklytics/ethereum-blocks';

// Run: `node getBlockFromtimeStamp.js` to see the block number at the given date. 

const date = 'Fri Dec 24 2021 10:22:12 GMT';                    // The date you want to get the block number from.
const timestamp = Math.round(new Date(date).getTime() / 1000);  // Unix timestamp in seconds

getBlockFromTimestamp(timestamp).then(block => {
    // result 
    console.log('BLOCK:', block, 'AT:', new Date(timestamp * 1000).toUTCString());
})

////////////////////////////////////////////////////////////////////////////////////
async function getBlockFromTimestamp(_timestamp) {
    try {
        const block_gql = `{ blocks(first: 1, orderBy: timestamp, orderDirection: asc, where: {timestamp_gt: \\"${_timestamp}\\"}) { number }}`;
        const query = `{ "query":"${block_gql}","variables":null }`;
        const response = await axios.post(SUBGRAPH_ETH_BLOCKS, query)
        return response.data.data.blocks[0].number;
    } catch (error) {
        console.log('getBlockFromTimestamp ERROR: ', error);
    }
}