https://www.the-race.com/assets/js/timezone.js?v=Ck-9_c9bv43y7o1k

1function enableLocalTime() {
2    if(document.querySelectorAll('.session_times').length > 0) {
3        const time_containers = document.querySelectorAll('.session_times')
4        const date_containers = document.querySelectorAll('.session_date')
5        const timezone_label = document.getElementById('timezone-label') 
6
7        function getValidOffset(time_container) {
8            const offset = time_container.getAttribute('data-gmt-offset')
9
10            if (offset && /^([+-])\d{2}:\d{2}$/.test(offset)) {
11                return offset
12            }
13
14            return '+00:00'
15        }
16
17        time_containers.forEach((time_container, i) => {
18            const end_time = time_container.getAttribute('data-end-time')
19            const start_time = time_container.getAttribute('data-start-time')
20
21            if(start_time != null && start_time.split('T')[1] != '') {
22                let offset = getValidOffset(time_container)
23
24                let formatted_start = moment(`${start_time}${offset}`).local().format('HH:mm')
25                let formatted_end = moment(`${end_time}${offset}`).local().format('HH:mm')
26
27                time_container.innerText = `${formatted_start}-${formatted_end}`
28
29                if (date_containers[i]) {
30                    date_containers[i].innerHTML = moment(`${start_time}${offset}`).local().format('ddd MMM D')
31                }
32            }
33        })
34
35        my_time_btn = window.document.getElementsByClassName('tab-1')[0]
36        local_time_btn = window.document.getElementsByClassName('tab-2')[0]
37
38        if(my_time_btn && local_time_btn) {
39            clearInterval(localTimeInterval)
40        } else {
41            return
42        }
43
44        my_time_btn.addEventListener('click', () => {
45            time_containers.forEach((time_container, i) => {
46                const end_time = time_container.getAttribute('data-end-time')
47                const start_time = time_container.getAttribute('data-start-time')
48
49                if(start_time != null && start_time.split('T')[1] != '') {
50                    let offset = getValidOffset(time_container)
51
52                    let formatted_start = moment(`${start_time}${offset}`).local().format('HH:mm')
53                    let formatted_end = moment(`${end_time}${offset}`).local().format('HH:mm')
54
55                    time_container.innerText = `${formatted_start}-${formatted_end}`
56
57                    if (date_containers[i]) {
58                        date_containers[i].innerHTML = moment(`${start_time}${offset}`).local().format('ddd MMM D')
59                    }
60                }
61            })
62
63            local_time_btn.classList.remove('active')
64            my_time_btn.classList.add('active')
65
66            if (timezone_label) {
67                timezone_label.innerText = 'your time'
68            }   
69        })
70
71        local_time_btn.addEventListener('click', () => {
72            time_containers.forEach((time_container, i) => {
73                const end_time = time_container.getAttribute('data-end-time')
74                const start_time = time_container.getAttribute('data-start-time')
75
76                if(start_time != null && start_time.split('T')[1] != '') {
77                    let formatted_start = moment(start_time).format('HH:mm')
78                    let formatted_end = moment(end_time).format('HH:mm')
79
80                    time_container.innerText = `${formatted_start}-${formatted_end}`
81
82                    if (date_containers[i]) {
83                        date_containers[i].innerHTML = moment(`${start_time}`).format('ddd MMM D')
84                    }
85                }
86            })
87
88            my_time_btn.classList.remove('active')
89            local_time_btn.classList.add('active')
90
91            if (timezone_label) {
92                timezone_label.innerText = 'local time'
93            }
94        })
95    }
96}
97
98const localTimeInterval = setInterval(enableLocalTime, 1000)