Epoch / Unix Timestamp Converter

Math.floor(Date.now() / 1000) // seconds
Date.now() // milliseconds

import time
int(time.time()) # seconds
int(time.time() * 1000) # milliseconds

date +%s # seconds
date +%s%3N # milliseconds

import "time"
time.Now().Unix() // seconds
time.Now().UnixMilli() // milliseconds

time(); // seconds
(int)(microtime(true) * 1000); // milliseconds

import java.time.Instant;
Instant.now().getEpochSecond(); // seconds
System.currentTimeMillis(); // milliseconds

DateTimeOffset.UtcNow.ToUnixTimeSeconds();
DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();

use std::time::{SystemTime, UNIX_EPOCH};
SystemTime::now().duration_since(UNIX_EPOCH).unwrap().as_secs();

-- PostgreSQL
SELECT extract(epoch from now());
-- MySQL
SELECT UNIX_TIMESTAMP();